This website uses cookies to ensure you get the best experience on our website. Learn more

Interstellar Travel: Approaching Light Speed

x

Interstellar Travel: Approaching Light Speed

Is interstellar travel doomed to remain in the realm of science fiction? Sticking to near future space propulsion only, how close can we get to the speed of light?

This video looks at the current spacecraft speed records with Apollo 10 holding the record for the fastest manned spacecraft, New Horizons probe for the fastest Earth escape velocity and the Helios probes for the fastest heliocentric velocity. But Solar Probe Plus will beat that when it launches in 2018. While Voyager 1 doesn't set any speed records, it was the first spacecraft to leave the solar system, so therefore the fastest solar system escape velocity by default.

For beating these speeds, this video explores what is possible in the near future only, so no antimatter, Alcubierre drives (warp), ramjets, etc... The EM drive is left out until it's proven with actual reproducible results in space.

Project Daedalus and the updated Project Icarus represent sound concepts for fusion spacecraft. IKAROS was the first successful demonstration of solar sail technology but hopefully the planetary society is not far behind with their LightSail cubsat (not covered in this video).

But what appears to have the most potential to reach the nearest star to our own, Proxima Centauri and it's newly discovered planet Proxima b is Breakthrough Starshot. Thousands of super lightweight laser sail nanocraft will be launched into space then the light beamer, a ground based laser array will propel these spacecraft to 20% light speed within minutes.

*All sources used in researching this video are listed in the end credits*

Music: Inspired Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
x

Interstellar Travel - Documentary HD #Advexon

Interstellar Travel
Interstellar travel is the term used for hypothetical crewed or uncrewed travel between stars or planetary systems. Interstellar travel will be much more difficult than interplanetary spaceflight; the distances between the planets in the Solar System are less than 30 astronomical units (AU)—whereas the distances between stars are typically hundreds of thousands of AU, and usually expressed in light-years. Because of the vastness of those distances, interstellar travel would require a high percentage of the speed of light; huge travel time, lasting from decades to millennia or longer; or a combination of both.

The speeds required for interstellar travel in a human lifetime far exceed what current methods of spacecraft propulsion can provide. Even with a hypothetically perfectly efficient propulsion system, the kinetic energy corresponding to those speeds is enormous by today's standards of energy production. Moreover, collisions by the spacecraft with cosmic dust and gas can produce very dangerous effects both to passengers and the spacecraft itself.

A number of strategies have been proposed to deal with these problems, ranging from giant arks that would carry entire societies and ecosystems, to microscopic space probes. Many different spacecraft propulsion systems have been proposed to give spacecraft the required speeds, including nuclear propulsion, beam-powered propulsion, and methods based on speculative physics.
x

Is Interstellar Travel Possible? (Time Dilation & The Speed of Light)

Can we travel at light speed? We teamed up with Popular Science to find out!

Like this video? Tweet us!:

Welcome to Thought Café +, an collaborative animated series with people and organizations we love. Subscribe so you never miss a video!

Take a 360° tour of our solar system:
Our video on pubic hair with AsapScience:

More Thought Café + videos:

Sound Design by Allan Levy

Follow us!






@thoughtcafe on Snapchat & Periscope
x

NASA's Engines and Possible Speed of Light Propulsion?

New propulsion technology is explained and the most advanced the ion engine, which in theory can propel a spacecraft nearing the speed of light.
x

NASA Engineer Designs a Near Light Speed Engine But Does It Work?

You can buy Universe Sandbox 2 game here:

Hello and welcome! My name is Anton and in this video, we will talk about a new NASA report that proposes an unusual engine design that could travel near the speed of light.
NASA report:

Support this channel on Patreon to help me make this a full time job:


Space Engine is available for free here:
Enjoy and please subscribe.

Twitter:
Facebook:
Twitch:

Bitcoins to spare? Donate them here to help this channel grow!
1GFiTKxWyEjAjZv4vsNtWTUmL53HgXBuvu

The hardware used to record these videos:
CPU:
Video Card:
Motherboard:
RAM:
PSU:
Case:
Microphone:
Mixer:
Recording and Editing:



Thank you to all Patreon supporters of this channel
Specifically, great thanks to the following members:

Morrison Waud
Vlad Manshin
Mark Teranishi
TheHuntress
Daniel Rosvall
Lilith Dawn
Ralph Spataro
Albert B. Cannon
Greg Lambros
adam lee
Henry Spadoni
Jer
Nick Dolgy
Luminger
Konrad Kummli
UnexpectedBooks.com
Gabriel Seiffert
George Williams
J Carter
Mary Kristof
Oleg Hurmak
Shinne
Jakub Glos
Lauren Smith
Michael Tiganila
Lyndon Riley
Johann Goergen
Jake Salo
LS Greger
Dave Blair
Michael Mitsuda
Russell Sears
Vinod sethi
Robert Wyssbrod
RandalM
Gordon Cooper
Tracy Burgess
Assaf Dar Sagol
Jayjay Volz
Liam Moss
Timothy Welter MD
Kai Raphahn
Sander Stols
Anataine Deva
Sergio Ruelas
Bodo Graßmann
Douglas Burns
gary steelman
Jan Šoulák
Michael Koebel
Olegas Budnik
Shelley Passage
Steven Aiello
xyndicate
Honey Suzanne Lyons
Dale Andrew Darling
James Myers
Niji
Peter Hamrak
Matthew Lazear
Anton Newman
Anton Reed
Charles Nadeau
Daniel Charles Smith
Daniel G.
Dave A
Doug Baker
Doug MacDonald
Eugene Sandulenko
GrittyFlix
Max McNally
Minovsky Man
Mr Fluffington
Paul Koploy
Sal Carrera
Victor Julian Castillo
Becky
Steven
Jacob Spencer
brian plummer
Lee Densmore
Sir David Coyne
Veronika A. Czebe
Steve Wotton
Adam Smith
Alberto Diaz Saldana
Chaos Gamer
Daniel Coleman
Jana Persson
Kearny Li
Rafael Aguila
Rock Howard
Tedd Speck
rfc1135
Vincent L. Cleaver
Claye Griffith
David Lewis
JohnTaylorWalker
Kyle eagle
Michael J Fluharty
Tarik Qassem
Scary ASMR
Arp Lee
Barnard Rabenold
Lisa Stadlbauer
Lisette Ramos-Voigt
Márton Fülöp
Reynir Guðmundsson
Rs Wlms
tom g.
Greyson Flippo
Hampton Tunis
Ivan Gallagher
Jordaen Davids
Lynn Johnson
Rob Law
Thierry Ray Jehlen Gasnier
Troy Schmidt
William Warren
Arikkat Unnikrishnan
Uwe Böhnke
Carla
Deanna Korell-Hall
Dipen Bhattacharya
Josh Shultz
Samuel Mathison
Bryan Linsley
Chris Bingley
David Bennett
David Wortz
Douglas Wilkinson
Lionel Sleeper
Markus Bidi
Matthew C Weiss
Michael McCloskey
Mr. Numi Who-
Orlando J Carter
Peter Sedmák
Randall J Silva
Vladyslav Kurmaz
Walter van der Kamp
Brittany House
david jungerman
Doug Beeferman
JL Solidum
Luis M Gaytan Tovar
Men I Trust
Sol Bergeron Beauchemin
Hernán Coronel
Mr MOD
Branden Loizides
Chris the Mad Sciencer
Christopher Borra
Dave
Hein Spijker
Ingmar Rauschert
James McClarty
karlos preddie
Kitara Burke
Lance Fielden
Laura Coutu
Luis Lengsfeld
Lumi Pakkanen
MARK ANDERSON
Michael R Mendoza
Miek Thompson
N30D@nt3
Robert Clyde
Steven Uttley
Susanne Bauer
Suzanne Brummitt
Yvan Lengwiler
Łukasz Adamski
Todd Gregory-Gibbs
Adam Burnett
Christian Rane
gene valle
Hidden Hinges
Jan-Chris
Jelle Baris
john requa
Joseph Conard
kristian svensson
Qauthar Saleh
Tuukka Arola
Allen DuBeau
Bob Goswick
Daniel Schakel
Derek Bamber
Gerald Williams
Gideon Falta
Gregory T Hart
Jennifer Pumphrey
Marcel Barros
Michael Luce
Peyton Vaughn
Quasar
Sandy Flowers
Svein Trondsen
Bonnie Veldey
Christian Jochum
Daniel Morris
Dreameroutthere
Jeff Blakemore
Maciej Świerczewski
Mahesh Gopalan
Marilyn Aldridge
Paul Maybury
Richard Reich
RiddleJacks
Sean Spartan
Tim Jones
Paul dunn
Robert the Green
JoachimB
Alec Estrada
Devonte Foy
Gawen Thompson
Jessica Anderson
Ketan More
Nina and Ivan
PartyMartyy & Dem OTF Bois
Patrick Denny
PAUL G STEWART
Sander Hollebrand
Suzanne Miezis
ZarconDeeGrissom
Galen Thurber
Indy Car
Joseph Wheeler
Julia Ruggiero
Norm Zemke
Phlllp A Falson
Rafael Espericueta
Brian Jorgensen
Darktorn
David Campos
Irene Ka
Jefware
Laura Sanborn
maycon kruger
Mike Laffoon
Patrik Franzén
Stephen Bowland
Vyacheslav Ermakov

Check Patreon to join!

Fastest way to reach Mars in 20 minutes at no cost - Connectome

Derek Muller (Veritasium) asks Michio Kaku (Nov 4, 2015) about whether it is possible to do interstellar space travel and Michio Kaku explains different ways that we are deploying right now like booster rockets, nuclear rockets, antimatter rockets but all of these are very expensive and takes lots of time. But there is another way that humanity isn't taking seriously and that is connectome aka sending human consciousness into space on a laser beam and it can help us reach alpha centauri in just four years.

You can also buy a book on connectome -

For more information on connectome -






More about derek muller veritasium -


Other intersteller methods -
Antimatter Rockets -





Journey Through The Universe At The Speed Of Light (4K UHD)

Light is incredibly fast, but frustratingly slow when it comes to travelling the universe. So how long does it take light to travel to Mars or Proxima Centauri? Find out here!

My Patreon *Star* list -
*** Ryan May ***
*** Silverfleur ***
*** LunaGirl (aka Claire) ***
*** Kaito Hirota ***
*** Robin M ***

Want to help support my channel and also get added benefits? Then why not become a Patron today?


Or maybe purchase some of our awesome merchandise! T-shirts, hoodies, mugs, phone cases, it's all available now on YouTube!

Also, check out our Amazon store! Just click on the link below to find loads of awesome items -
(US Version)
(UK Version)

**BUT REMEMBER TO SUBSCRIBE FOR MUCH MORE TO COME**

Subscribe -
Facebook -
Twitter -
Instagram -

Music attribution - Lightscape by Simon Wilkinson at (Purchased License)

Light Speed Travel

The speed of light is more of a hot topic than ever nowadays. It is the speed at which photons travel in a vacuum- and is the fastest speed achievable within the universe. As creatures of exploration and innovation, understanding light speed has naturally led us on a quest to try and determine a method with which we can reach it, and eventually one day exceed it. Si-Fi fantasy or not, a galaxy of the Milky Way’s vastness would require such speeds to make exploring it somewhat of a possibility for a race such as humanity’s. But there are some drawbacks. The difficulty of developing light speed travel, or propulsion systems that could travel at a high percentage of it, is enormous- and may be impossible altogether. Furthermore, our current understanding of physics suggests that were you to travel at this immense speed, you would be making more of a sacrifice than you first anticipate, as light and time go hand in hand at the limit of possibility. Nonetheless, we are investing, investigating and innovating, and examining the skies and the stars, as we search for a way to travel at the ultimate speed of light…

FOLLOW MY NEW TWITTER!


Want more videos? Click here to subscribe:

Join the NEW, OFFICIAL PARTNER #SeaSquad 100K Discord Server!


MUSIC:
- CO.AG:
- Chris Zarbriskie:

FOOTAGE:
- A Space Journey (8m Exhibition):
- Green Nebula Fly-By:
- Blue Nebula Fly-Through:
- Spinning Galaxy Loop:
- 4K Nebula Eye Scene:
- 1-Minute Galaxy Zoom:
- Satellite Dish: - Provided by Beachfront under a Creative Commons license
- Particles: - Provided by RoyaltyFreeTube under a Creative Commons License
- Rocket Blast Off:
- Nebula Space Scene: - Provided by RoyaltyFreeTube under a Creative Commons License
- Void / Dust Footage:
Remaining outstanding footage provided by Videezy.com


- Popular Playlists! -
• Creepy Playlist:
• Out of this World:
• Conspiracy Cases:
• G-News:

- Out of this World -
• The Fermi Paradox:
• The Cold Spot:
• Bootes Void:

- Conspiracy Cases -
• 11B-X-1371 Mystery:
• Dyatlov Pass Incident:
• Denver Airport Conspiracy:

- GD -
• G-NEWS:
• The Best Of Lists:
• Community Commentary:
• Full GD Playlist:

- Maps From Hell Series -
• Bloodlust Episode:
• Yatagarasu Episode:
• Plasma Pulse Series Episode:

5 REAL Possibilities for Interstellar Travel

Tweet at us! @pbsspacetime
Facebook: facebook.com/pbsspacetime
Email us! pbsspacetime [at] gmail [dot] com
Comment on Reddit:
Support us on Patreon!

Help translate our videos!

The prospect of interstellar travel is no longer sci-fi. It COULD be achievable within our lifetime! But, how would an interstellar rocket-ship work? On this week's episode of Space Time, Matt talks options for interstellar travel - from traditional rocket fuel to antimatter drives, could we travel to other star systems? Watch this episode of Space Time to find out!

Quantum Entanglement & Spooky Action at a Distance:


The Real Meaning of E=Mc²:


Could You Fart Your Way To The Moon:


The Speed of Light is NOT About Light:


----------------------------------------­­---------

COMMENTS:

andrea papone


Jai Kalra


RedStefan


TheColonel


Tyler Hamilton


----------------------------------------­­---------

Let us know what topics you want to learn more about:

Can We Travel Faster Than Light? with Dr. Miguel Alcubierre

Can humanity build an Alcubierre warp drive?
Can we go faster than light?

Dr. Miguel Alcubierre was inspired by Star Trek the Next Generation's example of warp drive faster than light technology on the starship Enterprise. In 1994 he wrote a paper on how we could bend and warp space and time to travel faster than light within the rules of Einstein's general relativity. NASA has and is currently exploring if it is possible to bend the fabric of space and achieve hyper fast space travel with the Eagle Works lab. John Michael Godier spoke with Dr. Miguel Alcubierre on the feasibility of the Alcubierre warp drive and if there has been any developments within physics, including the use of dark matter or dark energy, and anti-gravity, to be able to make this possible.


The warp drive: hyper-fast travel within general relativity, Alcubierre, 1994.


Hyperfast Interstellar Travel in General Relativity,
Krasnikov, 1995.


Harold White, Warp Field Mechanics 101


Harold White, Warp Field Mechanics 102



Website:


Patreon:


Twitter:


Instagram:


Thank you
Dr. Miguel Alcubierre
Mark Rademaker
Steve Ryan
x

Interstellar Travel Challenges

This episode focuses on many of the problems with travel between stars at relativistic velocities, like collision avoidance, radiation, ship geometry, armor, and point-defense.

We will also look at some of the possible engine types and discuss realistic maximum speeds they offer.

Visit our Website:
Join the Facebook Group:
Support the Channel on Patreon:
Visit the sub-reddit:
Listen or Download the audio of this episode from Soundcloud:
Cover Art by Jakub Grygier:

Special Thanks to Liam Davis of Lombus, for use of the song Hydrogen Sonata, available here:

3 Things 'Faster Than Light'

These 3 things go faster than the speed of light. How's that even possible?
Subscribe:
↓Want more info?↓

More about the experiment:
Marissa Giustina’s research:

Advanced scientific note about Doppler: If there is a light moving away from you at constant velocity in static flat (Minkowski) space-time, no matter how red it is, you will never conclude it is going faster than light. But, here I am discussing the conclusions one might come to if you mistakenly use Doppler in the context of the curved space-time of the universe (where there is expansion). Interpreting the huge redshift as a result of the doppler effect, could make one think that galaxies we see are moving away at speeds approaching light speed. And since what we are actually seeing is light from those galaxies from billions of years ago, and given that the universe is expanding, you might be tempted to say that they have since accelerated to faster than the speed of light. You might go further and say that there are more distant galaxies that we can't see which are moving away even faster. So you might conclude there are galaxies moving faster than light in the universe. But the redshift isn't from doppler and this acceleration of the expanding universe isn't actually causing a true increase in velocity.

Sometimes astronomers do say there is a faster than light recession speed by pretending the expansion of the universe is causing distant galaxies to move away from each other at a corresponding velocity, but that's misleading. In general relativity, you can actually have an increase in space between objects without causing a corresponding increase in the relatives velocities of those objects.

CREDITS:

Host, Writer, Animator, Editor:
Greg Kestin

From the producers of PBS NOVA
© WGBH Educational Foundation

Funding provided by FQXi

Special thanks:
Marissa Giustina
Nick Hutzler
Julie Elksy
Byron Drury
Jacob Barandes
Tyler Howe
Lissy Herman
Ari Daniel
Lauren Aguirre
Kristine Allington
Allison Eck
Anna Rotschild

MEDIA CREDITS:

Music provided by APM:
Deep_Science_No-perc
Mysteries_of_Science_B
Dreaming_of_the_Stars_a
Curiosity_Kills_the_Cat_2
Conundrum_a

Images:
Stars - Rene Barrios
Earth - Eirika
galaxy spiral (by coornio - diviantart)
Squirrel with scissors - 60811670 - Dollarphotoclub
Equations - 91613623 - Dollarphotoclub
Maxresdefault - Sean Stewart
Marissa Giustina - Lammerhuber
Tangled cat - David Swayze
Cat doll - Vicky Somma

Stock footage:
train-exits-tunnel - Pond5
Bin_pulsar_442 - Courtesy of Nasa
Expanding in space (40294) - Courtesy of Nasa
WMAP_archive - Courtesy of Nasa

The Secret To Interstellar Travel | Unveiled

Interstellar travel has been humanity's dream for decades! Our greatest scientists and engineers have been trying to work out exactly HOW we can branch out from Earth, to live in amongst the stars in the wider universe! The problem is that space is so inconceivably HUGE! In this video, Unveiled explores the science behind interstellar travel... to find out whether we'll EVER be able to jet off to distant planets and alien worlds!

This is Unveiled, giving you incredible answers to extraordinary questions!

Find more amazing videos for your curiosity here:
What Will Happen When the Sun Dies? -
What Are Black Holes Made Of? -

Are you constantly curious? Then subscribe for more from Unveiled ►

#Space #Universe #SpeedOfLight #Science #Physics #Interstellar #SpaceTravel

Will Wormholes Allow Fast Interstellar Travel?

Sign Up on Patreon to get access to the Space Time Discord!


Check out the Space Time Merch Store


Sign up for the mailing list to get episode notifications and hear special announcements!


From Stargate to Interstellar, wormholes are our favorite method for traveling across fictional universes. But they are also a very serious field of study for some of our greatest minds over the last century. So what’s the holdup? When do we get to wormhole ourselves out of here?

Hosted by Matt O'Dowd
Written by Matt O'Dowd
Graphics by Leonardo Scholzer, Yago Ballarini, & Pedro Osinski
Directed by: Andrew Kornhaber
Camera Operator: Bahaar Gholipour
Executive Producers: Eric Brown & Andrew Kornhaber

#space #astrophysics #interstellar

Special Thanks to Our Patreon Supporters!

Big Bang Supporters
Alexander Tamas
David Nicklas
Fabrice Eap
Juan Benet
Morgan Hough
Radu Negulescu

Quasar Supporters
Christina Oegren
Mark Heising
Vinnie Falco

Hypernova Supporters
chuck zegar
Danton Spivey
Donal Botkin
Edmund Fokschaner
Hank S
John Hofmann
John Pollock
John R. Slavik
Jordan Young
Joseph Salomone
Julian Tyacke
Mathew
Matthew O'Connor
Syed Ansar
Timothy McCulloch
william bryan

Gamma Ray Burst Supporters
A G
Adrian Hatch
Adrien Molyneux
AlecZero
Andreas Nautsch
Bradley Jenkins
Brandon labonte
Brandon Lattin
Brian Blanchard
Craig Stonaha
Dan Warren
Daniel Lyons
David Bethala
David Hughes
DFaulk
Douglas Cantrell
Eric Kiebler
Frederic Simon
Geoffrey Short
Graydon Goss
Greg Smith
John Funai
John Robinson
Josh Thomas
Justin Waters
Kevin Lee
Kevin Warne
Kyle Hofer
Malte Ubl
Mark Daniel Cohen
Matthew Ryan
Michael Conroy
Mirik Gogri
Nick Virtue
Nick Wright
Nickolas Andrew Freeman
Patrick Sutton
Paul Rose
Protius Protius
Robert Ilardi
Scott Gossett
Sean Warniaha
Shane Calimlim
Steve Bradshaw
Tatiana Vorovchenko
Tim Stephani
Tonyface
Tybie Fitzhugh
Yannick Weyns
Yurii Konovaliuk

How Close Are We To Star Trek's Warp Drive?

Can travelling at the speed of light become more than just fantasy?

Can Planes Ever Be Environmentally Friendly►►►►
Sign Up For The TestTube Newsletter Here ►►►►

Read More:
Space and Time Warps

“Picture
In science fiction, space and time warps are a commonplace. They are used for rapid journeys around the galaxy, or for travel through time. But today's science fiction, is often tomorrow's science fact. So what are the chances for space and time warps.”

Warp Drives May Come With a Killer Downside

“Planning a little space travel to see some friends on Kepler 22b? Thinking of trying out your newly-installed FTL3000 Alcubierre Warp Drive to get you there in no time? Better not make it a surprise visit — your arrival may end up disintegrating anyone there when you show up.”
____________________

DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily.

Watch More DNews on TestTube

Subscribe now!

DNews on Twitter

Trace Dominguez on Twitter

Lissette Padilla on Twitter

DNews on Facebook

DNews on Google+

Discovery News

Download the TestTube App:

Sign Up For The TestTube Mailing List:
x

The Big Problem With Interstellar Travel

Start learning intuitively with Brilliant for 20% off by being of the first 200 people to sign up at

Get RealLifeLore T-shirts here:

Please Subscribe:

Animations courtesy of Josh Sherrington of Heliosphere:

Facebook:
Twitter:
Reddit:
Instagram:

Subreddit is moderated by Oliver Bourdouxhe

Special thanks to my Patrons: Danny Clemens, Adam Kelly, Sarah Hughes, Greg Parham, Owen, Donna

Videos explaining things. Mostly over topics like history, geography, economics and science.

We believe that the world is a wonderfully fascinating place, and you can find wonder anywhere you look. That is what our videos attempt to convey.

Currently, I try my best to release one video every week. Bear with me :)

Elon Musk on How to Travel Faster than Light Speed “Space travels faster than the speed of light”

“There is conceivably a way to do warp drive.” Elon Musk discusses warping space within the known laws of physics, the expansion of the universe being faster than the speed of light (which allow us to see back in time when looking into space) and dark matter.

Stephen Hawking - Rocket to the Future

Stephen Hawking examines how we may some day, travel to the future.

Into The Universe With Stephen Hawking - Time Travel

This video belongs to Discovery Communications and is being used for educational purposes only

What happens as you approach the speed of light?

As you go faster, what happens to time and space? What would happen if you could manage to go the speed of light? Astrum Answers!
Go to to get a free trial and 10% off your first purchase.

To play A Slower Speed of Light yourself, check it out here:

SUBSCRIBE for more videos about our other planets.
Subscribe!
Facebook!
Twitter!

Donate!
Patreon:
Ethereum Wallet: 0x5F8cf793962ae8Df4Cba017E7A6159a104744038

Become a Patron today and support Astrum! Donate link above. I can't do it without you. Patreons can help pick the next Astrum Answers in a fortnightly poll. Thanks to those who have supported so far!

Astrum Hindi:
Astrum Spanish:


Music Credit: Cell's Tranck - Hanging Masses



Image Credits:
NASA
A Slower Speed of Light
Pexels

The sad story of travelling the speed of light

The speed of light and black holes. What happens when at the speed of light? What about a black hole? This video explains how time dilations works with very fast relativistic speeds. The equation and the intuition behind the logic.

We cover some of Albert Einstein relativistic physics theory.



0:00 - Introduction
0:16 - Why time is relative
1:09 - Time of different reference systems
2:27 A light speed journey

3:16 - Gravitational time dilation



 - - - - - - - - - - - -
Support pay what you want:

- - - - - - - - - - - -

#Physics #Relativity #Light

Shares

x

Check Also

x

Menu