Astronomy Staff, Author at Astronomy.com | Page 5 of 276

Artist's rendition of asteroid Psyche

Could Psyche be the core of the planetesimal that struck Earth and formed the Moon?

The expanding universe

How can the visible universe be 46 billion light-years in radius when the universe is only 13.8 billion years old?

The Sun rises at Stonehenge.

Observing, The Sun

Will the Sun always shine through Stonehenge on the solstice?

Merging black holes

When black holes merge, is the diameter of the new black hole bigger?

A color image of Pluto shows its heart-shaped section.

Science, Solar System

Is Pluto a planet? It depends.

HST image of Jupiter near opposition

Science, Solar System

How old is each planet in our solar system?

Artist's concept of Planet X

Could we find Planet Nine using JWST?

Location of Jupiter's Trojan asteroids

How closely packed are Jupiter’s Trojan asteroids?

The May 2024 issue of Astronomy Magazine.

Astronomy Magazine Annual Index

When stars “die,” they leave one of two objects behind. Massive stars explode as supernovae, creating remnants of gas and dust like the Crab Nebula (M1). Credit: ASA, ESA, J. Hester and A. Loll (Arizona State University)

Milky Way, Stars

How many stars die in the Milky Way each year?

Jupiter image taken by the James Webb Space Telescope. Credit: NASA.

Science, Solar System

Jupiter: Size, distance from the Sun, orbit

Solar System, The Sun

When did we realize that Earth orbits the Sun?