On this scale a circle two and a half miles in diameter would include all the members of our solar system; but on this scale the nearest fixed stars would be nearly as distant as is our moon.

The most detailed infrared map of the Milky Way ever made has been published after observations by the VISTA telescope over ...

For about 4.5 billion years, our planet has circled the sun on a stable, rhythmic path. Each of Earth's orbits takes ...

Looking at a distant galaxy means looking back in time.

We now know that black holes occur frequently throughout the universe. One Sagittarius A* sits at the center of our galaxy, ...

New Horizons—the famous NASA spacecraft that flew by Pluto in 2015—is now making new discoveries beyond the Kuiper Belt. With ...

The first rocky planet ever spotted orbiting a burned out star called a white dwarf offers a glimpse of what may be in store ...

A new paper explores the idea of asteroid-sized objects that may be causing gravitational ripples in our cosmic neighborhood.

The simulated Milky Way-like galaxy at present taken from the simulation ... a record for any object beyond our solar system. Exactly how, why and when elements are produced is the focus of ...

"Even though our galaxy, as well as the Andromeda galaxy, has 100 billion stars in it, they're very far apart." Not only will the solar system survive, but Earth will see a spectacular show as the ...

The Milky Way is a spiral galaxy and our Solar System is about half-way along one of its arms. Our Sun orbits the centre of the Milky Way at about 140 miles every second. It takes about 230 ...