A study suggests our sun is about the lowest mass star that - when it dies - produces a visible, though faint, planetary nebula. What happens when our sun dies.
Researchers at Johns Hopkins are simulating haze on water worlds. The haze muddles observations but can also help determine if an exoplanet is habitable.
Comet Halley reaches its farthest point in orbit from the sun on December 9, 2023. It'll then begin its return trip to the inner solar system, arriving in 2061.
There's a dark region near the Milky Way's center known as the Brick. This cold cloud of gas and dust should be forming stars, but, strangely, it's not.
NASA's James Webb Space Telescope has found molecular building blocks of rocky exoplanets in a region previously thought to be too extreme and hostile.
Scientists think we could live in a giant void, a less-dense bubble leftover from the Big Bang. If so, it could explain the expansion rate of the universe.
Modern physics is founded on 2 pillars: Einstein's gravity and quantum mechanics. But these 2 theories contradict each other. Does this theory reconcile them?
Astronomers have found the 1st giant stream of stars outside a galaxy. It lies among the galaxies in the Coma cluster, and it may shed light on dark matter.