Hubble Space Telescope observations of white dwarf star G238-44 has shown that it is "consuming both rocky-metallic and icy ...

For the first time, scientists combined the power of NASA’s Hubble and James Webb Space Telescopes in search of far-flung bodies deep in our solar system.

Planets without stars to orbit raise important questions about how planets evolve and what habitability might look like ...

NASA’s Nancy Grace Roman Space Telescope launched on Aug. 30, 2026, beginning a journey that will take it about a million ...

Thousands of planets have been discovered beyond our solar system, offering clues to where life might thrive and whether ...

Sheppard joined Carnegie as a prestigeous NASA Hubble Fellow in 2004 and was appointed to a faculty position in 2007. He ...

That pattern backs a "born big" view of planet construction. In the early solar system, clouds of pebble‑size material in the ...

The BepiColombo mission, by the European Space Agency and the Japan Aerospace Exploration Agency, is only the third to study our smallest planetary neighbor ...

Scientists have puzzled over why the planet dubbed "Earth's twin" doesn't have a moon. Computer simulations hint that if Venus ever did have one, it probably would've cannibalized its companion ...

Add Yahoo as a preferred source to see more of our stories on Google. About 4.6 billion years ago, a celestial cloud collapsed, paving the way for our solar system to form. Then, a nebula with strong ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to reach somewhere truly empty? Our first stop is the International Space ...

Our definition of a planet has changed over the years — causing a bit of confusion. | Credit: wasan prunglampoo/Getty Images Over the past 250 years, the number of "planets" in our solar system has ...