Latest about gravity
Red supergiant stars 'dance' because they have too much gas
The light they produce wobbles around, making them hard to pin down.
Why are asteroids and comets such weird shapes?
Small bodies like asteroids and comets are shaped more by their geological makeup than by gravity, which molds planets and moons into spheres.
What's the maximum number of planets that could orbit the sun?
If a super-advanced civilization had to ability to engineer the solar system from scratch, how many planets could they squeeze around the sun?
Could the moon ever be pushed from orbit, like in 'Moonfall'?
What would it take to dislodge the moon from its orbit and send it on a collision course with Earth?
Curvature of space-time measured using 'atomic fountain'
A group of physicists has measured gravity using the effects of time dilation — the slowing of time imparted by increased velocity or gravitational force — on atoms.
Giant black hole inside a tiny satellite galaxy defies explanation
A tiny galaxy orbiting at the outskirts of the Milky Way appears to have a giant black hole at its center, comparable to that of the much larger Milky Way itself, and scientists don't know why.
What is time dilation?
Time dilation refers to the fact that time passes at different rates for different observers, depending on certain variables.
Why do the planets in the solar system orbit on the same plane?
About 4.5 billion years ago, the solar system was just a giant, spinning cloud of gas and dust. Today, it's flat. Here's how that happened.
