Here’s what deep-space objects are, what optics you’ll need to see them and how to plan your observing. When you purchase ...

New research suggests that middle-aged stars like the Sun may offer the most stable environments for complex life to emerge.

Interstellar comet 3I/ATLAS is even more extreme. The ratio of semi-heavy water to regular water is 30 times larger than in ...

Astronomers, using the Atacama Large Millimeter/submillimeter Array (ALMA), have confirmed the existence of a close quasar ...

New observations of interstellar comet 3I/ATLAS show high levels of deuterated water, suggesting it formed in a colder star ...

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

It was 1972 and Apollo astronauts Harrison “Jack” Schmitt and Eugene Cernan had just stepped onto the moon’s surface to begin collecting rock and soil samples. Related Articles US health officials nix ...

Scientists are grappling with a cosmic mystery: why does the Universe behave differently on massive scales compared to our ...

By studying galaxy clusters separated by hundreds of millions of light-years, Penn physicist Patricio Gallardo and ...

The Nancy Grace Roman Space Telescope, named after NASA’s first chief astronomer, is now complete after more than a decade of development.

NASA unveiled a new telescope on Tuesday to scan vast swaths of the universe for planets outside our solar system and probe ...

Rather than slowly condensing over millions of years, the first building blocks of Earth and other planets may have formed ...