Why So Many Meteorites Come From The Same Place
Because of space physics, one faraway asteroid is likely the progenitor of almost a third of all the meteorites on Earth.
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Asteroid: A rocky body smaller than a planet that is orbiting the sun.
Meteoroid: A smaller rocky body moving in the solar system.
Meteor: A meteoroid that has entered the Earth’s atmosphere.
Meteorite: A meteor that hits the Earth.
Orbital resonance: A force that occurs when orbiting bodies exert a regular, periodic gravitational influence on each other, because of the length of their relative orbits.
Kirkwood Gap: A dip in the distribution of main belt asteroids that correspond to the locations of orbital resonances with Jupiter.
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Burbine, T., McCoy, T., Meibom, A., Royer, C., Gladman, B., and Keil, K. (2002). Meteoritic Parent Bodies: Their Number and Identification. Asteroids III. 653-667. Retrieved from:
Farinella, P., Gonczi, R., Froeschle, Ch., and Froeschle, C. (1993). The Injection of Asteroid Fragments into Resonances. Icarus. 101: 174-187. Retrieved from:
Fieber-Beyer, S., Gaffey, M., Bottke, W., and Hardersen, P. (2015). Potentially hazardous Asteroid 2007 LE: Compositional link to the black chondrite Rose City and Asteroid (6) Hebe. Icarus. 250: 430-437. Retrieved from:
Gaffey, M. and Gilbert, S. (1998). Asteroid 6 Hebe: The probable parent body of the H-type ordinary chondrites and the IIE iron meteorites. Meteoritics and Planetary Science. 33: 1281-1295. Retrieved from:
Vokrouhlicky, D., and Farinella, P. (2000). Efficient delivery of meteorites to the Earth from a wide range of asteroid parent bodies. Nature. 407: 606-608. Retrieved from:
Moons, M. and Morbidelli, A. (1995). Secular Resonances in Mean Motion Commensurabilities: The 4/1, 3/1, 5/2, and 7/3 Cases. Icarus. 114: 33-50. Retrieved from:
Burbine, Thomas. (2017). Assistant Professor of Astronomy, University of Massachusetts. Personal Communication.
What Happens When a Meteorite Strikes Earth? -- Extreme Science #1
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Really hope you liked this episode! There will be two more coming out so stay tuned! Special thanks to PopSci for giving me permission to put these on my channel.
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The Life of a Meteorite
The difference between meteorites, and meteoroids, and where they come from.
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Where Do Meteorites Originate? : Planets & Moons
Meteoroid is the rock in space and meteor is a rock as it burns through the atmosphere and the meteorite is the actual rock once it's burned through the atmosphere. Find out more about where meteorites originate with help from an experienced astronomy professional in this free video clip.
Expert: Eylene Pirez
Filmmaker: bjorn wilde
Series Description: Even though we know a great deal about space, what we don't quite know yet is almost more interesting. Find out about planets and moons with help from an experienced astronomy professional in this free video series.
What Happens When Large Meteorites Fall to Earth?
If meteorites larger than 25 meters but smaller than one kilometer (approximately 1/2 mile) were to hit Earth, they would likely cause local damage to the impact area, including cratering, extreme waves, explosions, fire, and shattered glass from the sonic boom upon entering the earth's atmosphere.
Meteorite specialist Denton Ebel, Curator in the Division of Physical Sciences, compares impacts from Earth’s recent history.
#meteorites #craters #Earth #impacts #astronomy #astrophysics #solarsystem #space
ASTEROID CRASH COURSE
Asteroids can be hazardous to life on Earth, but they also provide clues about the early solar system. In the Asteroid Crash Course video series, Denton Ebel, curator in the Museum's Division of Physical Sciences, explains how asteroids formed and the varying degrees of destruction they cause when they fall to Earth.
What is an Asteroid?
Meteorite, Meteor: What’s the Difference?
Why Are There No Planets in the Asteroid Belt?
What Were the Biggest Asteroids to Hit Earth?
Can Asteroids Be Deflected?
How Are Large Asteroids Tracked?
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© American Museum of Natural History, New York, NY
How to ID / Identify a Meteorite - Stone
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In 3 simple steps, you can identify if a stone is a meteorite or meteorwrong. All done in the field while hunting, only requires a magnet, a file, and the knowledge in this video.
Far too many people think they have meteorites but don't know for sure. Here is the video to find out. And don't be afraid of bad news, only 1 in a 500 have a meteorite.
NASA Plans to Slam a Spacecraft Into an Asteroid
What if a deadly asteroid was on a collision course to Earth? NASA and the ESA have come up with a solution.
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Asteroids impacting Earth can be devastating—killing all the dinosaurs in existence level devastating. But even the asteroids that aren’t mass-extinction huge can be a serious threat.
Every few thousand years Earth (a.k.a. you and I) get hit with a massive asteroid the size of the Great Pyramid of Giza, so what is the plan when we get hit with the next asteroid?
We get hit with an asteroid about the size of the Great Pyramid of Giza every few thousand years, and when the next one hits it could cause massive damage to an entire region. So when we spot the next one coming, what’s the plan?
Enter: NASA’s Planetary Defense Coordination office.
The Planetary Defense Coordination office is tasked with coming up with ways to protect the planet from threats from outer space.
And one of their great ideas is to smack a spacecraft head on with an oncoming asteroid to see if it can be slowed down and deflected. Members of NASA, the European Space Agency, and others are informally collaborating with a pair of missions that together are known as the Asteroid Impact and Deflection Assessment, or AIDA.
NASA is up first with a mission called the Double Asteroid Redirection Test, or DART. The launch window opens on July 22, 2021, and the goal is to nail an asteroid by late September or early October the following year.
Pretty cool, huh?
The target DART is aiming at is one of a pair of binary asteroids called Didymos B. Didymos is Greek for twin, hence the Double part of DART.
While the asteroid is not on a trajectory to hit Earth, it is an ideal candidate to see just how much of an impact will affect it because Didymos B is a moonlet 160 meters across that’s orbiting the much larger asteroid Didymos A, and as luck would have it, from our perspective it passes in front and behind the larger body, causing changes in the system’s brightness that we can measure.
When DART hits Didymos B at 6.6 kilometers per second, the asteroid’s speed will change by a fraction of a percent, but that’s enough to change the time it takes to orbit Didymos A by several minutes. Enough to be detected by telescopes roughly 11 million kilometers away here on Earth.
And not any old spacecraft will do when it comes to smashing into Didymos B.
Find out more about the spacecraft that will be used on this asteroid deflection mission and more on this episode of Elements.
#Asteroid #NASA #Earth #Space #Exploration #Seeker #Science #Elements
We’re going to slam a spacecraft into an asteroid to try to deflect it
An Earth-bound asteroid wouldn’t have to be huge to be a problem. Even something just a couple of hundred feet across could cause widespread devastation if it hit a town or city.
DART: Double Asteroid Redirection Test
An on-orbit demonstration of asteroid deflection is a key test that NASA and other agencies wish to perform before any actual need is present.
EARTH’S FIRST MISSION TO A BINARY ASTEROID, FOR PLANETARY DEFENCE
Planning for humankind’s first mission to a binary asteroid system has entered its next engineering phase.
Elements is more than just a science show. It’s your science-loving best friend, tasked with keeping you updated and interested on all the compelling, innovative and groundbreaking science happening all around us. Join our passionate hosts as they help break down and present fascinating science, from quarks to quantum theory and beyond.
Seeker empowers the curious to understand the science shaping our world. We tell award-winning stories about the natural forces and groundbreaking innovations that impact our lives, our planet, and our universe.
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What's inside a Meteorite?
We bought a $500 Meteorite only to cut it in half and put it in ACID! We also visited Meteor Crater in Winslow Arizona.
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What's The Difference Between Comets, Asteroids, Meteoroids, Meteors & Meteorites?
From their differences in sizes, to the impact they could have on Earth, join us as we explore the question, What's the Difference Between Comets, Asteroids, Meteoroids, Meteors & Meteorites?
A Whole Lot Of Rocks!
After hearing names like Comets, Asteroids, Meteoroids, Meteors & Meteorites, you likely are thinking, that's a lot of names for what is essentially space rocks! And you're honestly not wrong. It does feel like a lot of names are being thrown around for what is honestly just rocks, but you need to think of this in the grander scope of things. Because just like there isn't regular planets out there, or all stars aren't just one type, all of these rocks have a purpose in regards to their name. Even if it doesn't look like it at first, which is fine if you think about it, because most of the time we don't need to know or care about these things. But when it comes to how we look at our universe, we need to differentiate them.
Let's start at the beginning of everything, ok? Once upon a time, all of these various space rocks didn't exist. Whether you believe in a God or the Big Bang, the universe didn't have anything at first, and then, the wave of creation was born. For this video, we'll look at things from the Big Bang perspective. After the wave of energy and mass was delivered throughout the universe. Then, the gravities of various things like stars started to pull things together into tighter and tighter masses. This was how the planets got formed. But for the things that didn't become planets, they became things like Comets, Asteroids, Meteoroids, Meteors & Meteorites. Which means that these things, or at least many of these things, have been around since the beginning of the universe, and they've played a part in shaping a great many things in order to turn the universe, and even our solar system, into what it is right now.
Which means that while these names may feel superfluous, that doesn't mean they aren't impactful. And in fact, each and every one of these rocks have an impact whether you admit it or not. So, let's dive into them, and see what makes them so different, and so special.
So how about we start with obviously the most important one of the bunch, asteroids!
When you think about world breakers, you're likely thinking about an asteroid, and for good reason. Although if we're being technical, not all asteroids are as big as you think. In fact, they can be quite small. The smallest asteroid that we consider to be an asteroid is about 3 feet in length. Which may not sound that impressive compared to the ones that we're talking about, but you need to remember, three feet in length is over half the size of an average human. Which means if it were to hit Earth in that form? It could cause serious damage depending on where it lands.
So if that's the smallest pure asteroid, what would be the biggest? Well that's a bit tricky, because at one point in time it was a massive rock known as Ceres. This asteroid (at the time) was documented as being 590 miles in diameter, which is about 1/4 the size of our moon. If that thing hit us? Yeah, we'd be in big trouble. But that's the rub, it's not a threat, not just because of distance, but because it's on an orbit that technically won't have it reach us in any conceivable fashion barring a massive jarring of itself.
Oh, and that's the second rub, Ceres is so big that they actually made it a planet! Well, it's actually a dwarf planet, but yeah, they think it's so big that it can't be called an asteroid anymore. Which is fine I suppose, but it makes you wonder just how many other space rocks need a reclassification.
Getting back on track, the scale for an asteroid is now set between 3 feet and 590 miles in diameter. That's quite a reach, and that's partially why asteroids are so dangerous. They range in sizes in terms of lengths, and they also have a variety of sizes that make them hard to find, hard to track, and really unpredictable. Some of them are known to be dark masses of clay, yet others are bright shiny rocks made of metals like Nickel, or Iron.
Yet here's the thing, if we take all the known asteroids in the solar system and beyond? Their combined mass is not even as much as our own moon. To be clear, that doesn't make them dangerous, but that helps us gauge what to expect from them. Including knowing that a massive planet-sized asteroid ISN'T heading our way anytime soon.
You might be wondering now, How is it the Earth is so safe from asteroids when there are so many out there? You can thank our neighborly planets for that. You see, when our universe was formed, and by extension our solar system, it's true that there were a lot of big rocks floating around. But because of Mars and Jupiter, they were all corralled for the most part and trapped between the massive gravities of these two planets. The collisions that they caused actually created more asteroids of various sizes, but again, they're mostly trapped.
TOP 5 METEORITE FALLS
Meteorite falls, also called observed falls, are meteorites collected after their fall from space was observed by people or automated devices. All other meteorites are called finds. There are more than 1,100 documented falls listed in widely used databases, most of which have specimens in modern collections. As of early 2018, the Meteoritical Bulletin Database has 1,161 confirmed falls.
Observed meteorite falls are interesting for several reasons. Material from observed falls has not been subjected to terrestrial weathering, making the find a better candidate for scientific study. Historically, observed falls were the most compelling evidence supporting the extraterrestrial origin of meteorites. Furthermore, observed fall discoveries are a better representative sample of the types of meteorites which fall to Earth. For example, iron meteorites take much longer to weather and are easier to identify as unusual objects, as compared to other types. This may explain the increased proportion of iron meteorites among finds (6.7%), over that among observed falls (4.4%). There is also detailed statistics on falls such as based on meteorite classification. As of early 2018, the Meteoritical Bulletin Database has 1,161 confirmed falls with statistics for the previous decades in the table to the right. Specifically, confirmed falls were eight for 2015, eleven for 2016, and four so far for 2017.
The German physicist Ernst Cladni, sometimes considered as the father of meteoritics, was the first to publish (in 1794) the then audacious idea that meteorites were rocks from space. There were already several documented cases, one of the earliest was the Aegospotami meteorite of 467 BC and which became a landmark for 500 years.
While most confirmed falls involve masses between less than one kg to several kg, some reach 100 kg or more. A few are even more than one metric ton. The six largest falls are listed below and five (except the 2013 Chelyabinsk meteorite) occurred during the 20th century. Presumably, events of such magnitude may happen a few times per century but, especially if it occurred in remote areas, may have gone unreported. For comparison, the largest finds are the 60-ton Hoba meteorite, a 37-ton fragment (El Chaco) and a 30.8-ton fragment (Gancedo) of the Campo del Cielo, and a 30.9-ton fragment (Ahnighito) of the Cape York meteorite.
The Chelyabinsk meteor was a superbolide caused by an approximately 20-metre near-Earth asteroid that entered Earth's atmosphere over Russia on 15 February 2013 at about 09:20 YEKT (03:20 UTC), with a speed of 19.16 ± 0.15 kilometres per second (60,000–69,000 km/h or 40,000–42,900 mph). It quickly became a brilliant superbolide meteor over the southern Ural region. The light from the meteor was brighter than the Sun, visible up to 100 km (62 mi) away. It was observed over a wide area of the region and in neighbouring republics. Some eyewitnesses also felt intense heat from the fireball.
The Only Known Person Who Survived a Meteorite
According to scientists, you have higher chances to get struck by lightning, hit by a tornado, and blown away by a hurricane — all at the same time. However, there was one person who got this lucky chance! Um, maybe we shouldn’t exactly say “lucky” here?
In the early hours of November 30, 1954, a meteorite hit the roof of a home in the small town of Syl-a-cauga. The house's owner, Eugene Hodges, rushed home, only to find a huge crowd of gawkers looking at his dwelling, agitated and pointing fingers. He had to push them away from his doorstep to get to his wife, Ann, who was still inside. When Eugene opened the front door, what he saw shocked him.
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What happened to Ann 0:32
Why she had a nervous breakdown 2:33
Why meteorites are rare guests on our planet 3:55
Meteorites VS. Meteors 4:20
Chelyabinsk meteor 4:54
The most powerful meteor strike 6:07
Are we in danger? 8:07
#meteorites #truestories #brightside
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- Ann was laying on her couch, obviously in pain, an enormous bruise on her side. The roof had a large round hole in it, as if something big crashed through it.
- Everyone was in near panic because of the event. Some believed it was just a part of a wrecked airplane that fell somewhere around, while others thought it was a missile attack or something.
- The doctors who treated her confirmed a severe bruise, but nothing life-threatening. The meteorite itself was taken by the police and given to the US Air Force for inspection. There, experts confirmed it was indeed a chunk of space rock.
- Up to this day, Ann Hodges remains the only human to have ever been struck by a meteorite in the known history.
- Anyway, meteorites are extremely rare guests on our planet, mostly thanks to the layers of atmosphere that protect us from space assaults.
- One of the most spectacular examples of a meteor explosion was in 2013 in Chelyabinsk, Russia.
- Nobody really understood what was happening, and the confusion reached its peak when the shockwave struck. It sounded like a cannon shot, and the ground shook, rolling through the whole city.
- It was estimated that the explosion was about 30 times more powerful than an atomic bomb.
- But that wasn’t even the most powerful meteor strike witnessed by humans in the recent history. That one happened in the beginning of the 20th century, and it was also in Russia — namely, Tunguska, Siberia.
- To understand the sheer scale of the explosion, just imagine that a huge rock, weighing over 220 million pounds, entered the Earth’s atmosphere at the speed of 33,500 mph, and heated the air around it to the whopping 44,500°F.
- The space rock that exploded in the sky above Siberia was twice the size of the Chelyabinsk meteor and almost ten times as heavy.
- There were, of course, even more powerful and horrifying meteor events, such as one that presumably killed off the dinosaurs millions of years ago, but these two are probably the most impressive strikes in human history.
- However, rest assured: nothing big is coming our way in the near future, so we shouldn’t worry about meteorites any time soon.
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DEMYSTIFIED: What’s the difference — meteoroids, meteors, & meteorites | Encyclopaedia Britannica
Are meteoroids, meteors, and meteorites all different things? And if so, what's the difference?
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What Would Happen if a Meteor Hit Earth? | COLOSSAL QUESTIONS
Get in your bunker and stock up on water and canned goods, because today we’re tackling a truly terrifying question: what would happen if a giant meteor hit Earth??
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World’s Largest Meteorite Weights Over 100K Pounds But No One Knows Where It Came From
Very few people realize this, but every day, hundreds of pounds of space rock—we’re talking asteroid pieces, iron, rock, and nickel—falls to the Earth from outer space. By the time it lands, however, it has largely disintegrated, which is why we never see it. At least, that’s what’s supposed to happen.
Of course, there’s always an exception to the rule, and the Hoba meteorite might be the world’s biggest. What makes it so strange isn’t just its size or that it made it all the way to Earth intact. No, there’s something else about this spectacular space rock, and it has scientists completely stumped…
Scientists estimate that hundreds of pounds of meteoric material falls toward the Earth every single day. While most of it disintegrates before it reaches the surface, sometimes it lands completely intact. The Hoba meteorite is one of the best examples of one of these uber-rare instances.
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The cosmic secrets inside this tiny meteorite
Earlier this year, Verge Science went hunting for space dust on a rooftop in Brooklyn. The hunt turned up some promising samples, but looking at them under a microscope led to inconclusive results — even from the world’s foremost micrometeorite hunter. To get to the bottom of things, we took a trip to NASA's Johnson Space Center to learn how to verify suspected space samples and to learn about what these tiny specks could teach us about the secrets of the universe.
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How Close Are We to Mining in Space?
Asteroids hold untold riches when it comes to “untapped resources.” We are getting closer to harvesting materials from these celestial objects, but how close are we to mining asteroids?
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*Correction: While no evidence of new elements has been found in asteroids, they can indeed contain minerals that are impossible to form on Earth. We apologize for this error.
Asteroids could become the intergalactic pit stops for exploring the universe. They have the potential to become cosmic gas stations, and even the building blocks for habitats on Mars.
Asteroids can be huge, and they're almost everywhere in space. Asteroid mining could yield materials like platinum, iron, nickel, and cobalt; rare minerals; water; and even minerals that are impossible to form on Earth.
And while there are numerous kinds of valuable minerals on asteroids, the first and most important thing we need to do is learn how to extract water. Water is found in Carbonaceous asteroids, also known as C-type asteroids.
A water source in our planetary neighborhood could be a source of hydrogen and oxygen for rocket fuel and life support systems; a tool to shield us from radiation; and even a supply of drinking water for astronauts. The problem is that C-type asteroids are a bit tricky to find: the asteroids are incredibly dark. The good news is, all the sunlight they don't reflect gets absorbed, warms the asteroids up, and they glow in the infrared.
That's why NASA’s Jet Propulsion Laboratory is developing the Near-Earth Object Camera, or NEOCam, which, in addition to identifying potentially hazardous Near-Earth Objects, will be able to comb the infrared for evidence of C-type asteroids.
But what do we have to do to actually achieve asteroid mining? Find out more in this episode of How Close Are We?
Cosmic Detective Work: Why We Care About Space Rocks
From distant, icy comets to the asteroid that ended the reign of the dinosaurs, each space rock contains clues to epic events that shaped the solar system as we know it today -- including life on Earth.
Asteroid mining might actually be better for the environment
The first study of its environmental impact suggests that extracting resources such as platinum from asteroids might be cleaner than doing so on Earth.
Asteroid-Mining Plan Would Bake Water Out of Bagged-Up Space Rocks
This water, in turn, could provide relatively cheap and accessible propellant for voyaging spacecraft, lowering the cost of spaceflight significantly.
Flat Earth: Meteors, Meteorites, Comets, Craters & The Dome
Meteoroids, meteorites, comets and craters are nothing as we've been told. This documentary is intended to solve the confusions many have about these topics and to explain all the possibilities for each and to show how these phenomenons actually go against Heliocentrism and support Flat Earth.
Alien Rocks! (Meteorite)
Meteorites are smelly rocks that hurdle towards earth from outer space! Natalie invites her friend Elizabeth, a *geologist*, to learn all about these super cool alien rocks. ????
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Videographic on meteorites and asteroids – the solar system’s earliest known celestial bodies. NASA says it has detected a massive meteorite explosion over the Bering Sea which reportedly took place in December.VIDEOGRAPHIC
How to Find a Meteorite in Your Own Backyard
The Earth is peppered by meteorites all the time. This is how you can find one on your own.