gravity
Are Astronauts Really Weightless?
Look at those astronauts, flying through space without a care in the world. But how can they be floating when…
Don’t Look At Black Holes Too Closely, They Might Disappear
We've come a long way in 13.8 billion years; but despite our impressively extensive understanding of the Universe, there are still…
What is Gravitational Lensing?
Gravity's a funny thing. Not only does it tug away at you, me, planets, moons and stars, but it can…
How Do Cats Deal With Being Weightless?
Since my previous post was about dogs, its time to give equal time to the cats ... although I'm guessing…
Is Everything Actually Shrinking?
Whoa, here's something to think about. Maybe the Universe isn't expanding at all. Maybe everything is actually just shrinking, so…
A Universe of 10 Dimensions
When someone mentions "different dimensions," we tend to think of things like parallel universes - alternate realities that exist parallel…
Astronomers Discover First Mulitiple-image Gravitationally-lensed Supernova
How about four supernovae for the price of one? Using the Hubble Space Telescope, Dr. Patrick Kelly of the University of…
New Simulation Offers Stunning Images of Black Hole Merger
A black hole is an extraordinarily massive, improbably dense knot of spacetime that makes a living swallowing or slinging away any morsel of energy…
Higgs Boson Threatened The Early Universe, But Gravity Saved The Day
All the physical properties of our Universe - indeed, the fact that we even exist within a Universe that we can…
What’s Causing The Universe To Expand?
We've all heard that the Universe is expanding, but why is it expanding? What's the force pushing everything outwards? If…