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Is Earth getting closer to the sun, or farther away?Here's a look at whether Earth is getting closer to or farther from the sun, why that's happening and what effects it might have on our planet.
the-sun -
How can you experience weightlessness?How one earth (or space) can a person experience microgravity?
space -
Einstein's theory of general relativity passes one of its toughest tests yetScientists tested seven different predictions, in one of the most ambitious and involved challenges to general relativity ever undertaken — and the theory passed with flying colors.
physics-mathematics -
9 equations that changed the worldHere are nine equations that altered the course of history.
mathematics -
Where do electrons get energy to spin around an atom's nucleus?Quantum mechanics explains why the electrons can keep spinning indefinitely.
particle-physics -
'First of its kind' triple star system likely gobbled up a 4th starThe unusual trio is much more massive and compact than similar systems.
astronomy -
Red supergiant stars 'dance' because they have too much gasThe light they produce wobbles around, making them hard to pin down.
astronomy -
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.
asteroids -
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?
planets
