just another day

Name: Rebecca

Status: fangirl, photographer, artist, editor

Favorites: Star Wars, Doctor Who, Disney, FMA, Avatar: the Last Airbender and Klaroline.

I use the tumblr app 95% of the time.


The Fabric of Space-time

Image: What happens to light as it passes through a point of space-time in where mass has been applied, as well as why objects in space orbit the way they do (planets, galaxies, clusters, etc.)

Also known as the Space-time Continuum, I’ve always been fascinated about the very space that holds the planet we live on, stars we see at night, solar system we observe, and supernovas we stargaze on telescopes. In astronomy you hear the term space-time get used a lot and I thought I’d highlight key features that describe what this fabric is. I find it odd that not that many people stop to think what holds us up, how are we suspended in space-time? Well, technically we’re not suspended. We’re constantly moving, constantly orbiting. And it’s not just Earth and the solar system joining in on this cosmic dance, you can include star clusters, galaxies, super clusters and even Blackholes, just about everything in our Universe. Keep in mind that even as you read this post, our solar system is orbiting the Milky Way galaxy, traveling at roughly 220 kilometers a second!

What is Space-time?

Einstein visualized gravity as a manifestation of the curvature of space-time - the three space dimensions and a fourth time dimension. Most of us cannot visualize a curvature of four dimensional space-time, so visualize a curved two dimensional rubber sheet. Placing a mass on the rubber sheet curves it downward like space-time curves in the presence of a mass. On such a rubber sheet a small mass can circle around the curvature produced by a large mass, just as planets orbit the Sun. Or a mass can roll straight downward just as an object falls to the Earth. Space-time being the very “material” these events and masses take place on.

Einstein explained gravity as a result of the curvature of space-time near the presence of a mass. The differences between general relativity and Newton’s law of gravity only become noticeable when the gravitational force is very strong.

Einstein’s general theory of relativity is one of the crowning intellectual achievements of the 20th century and led to such predictions as black holes, gravitational lenses, and the expanding universe. So far it has passed every experimental test with flying colors.

Info via Suite101

(Source: afro-dominicano, via princekind)

May 21st 2012 2,190 notes
  1. inspiredrussian reblogged this from afro-dominicano
  2. aroundfirtree reblogged this from fumblingthroughchaos
  3. across-thestars reblogged this from likeaphysicist
  4. intellectual-candy reblogged this from illuminese
  5. juststufftoremember reblogged this from sadandplaidandstilesstilinski
  6. captainassjack reblogged this from heysammy
  7. beginswithz reblogged this from scinerds
  8. ablindedshepherd reblogged this from mirthalia
  9. arealfancifulthinker reblogged this from jongke
  10. mirthalia reblogged this from lazysmirk
  11. scarlettablack reblogged this from twistedsardonic
  12. fluorescentbrains reblogged this from twistedsardonic
  13. twistedsardonic reblogged this from blamoscience
  14. nothingelsefills reblogged this from theepitomeofnothing
  15. theepitomeofnothing reblogged this from scinerds
  16. sunchigiggles reblogged this from staarise
  17. staarise reblogged this from scinerds
  18. derpyderpness reblogged this from aionwatha
  19. aionwatha reblogged this from scinerds
  20. peculiaraura reblogged this from scinerds
  21. slowmotionluv reblogged this from uncover-the-world
  22. uncover-the-world reblogged this from ohaielly
  23. wcsteros reblogged this from ohaielly
  24. celestial-delinquent reblogged this from willful-embodiment
  25. ihtimalsizlikmotoru reblogged this from scinerds
  26. paris-collage reblogged this from scinerds
  27. braycorp reblogged this from gallantgambler
  28. theiamchronicle reblogged this from foreverisnowforever and added:
    I would like to know more about Einstein’s Special Theory of Relativity. Things moving at or near the speed of light. On...
  29. kalifrak reblogged this from theavengersbrokethephonebox
© MS