A newly discovered object speeding through our solar system could be something far stranger than a comet, possibly even alien ...

Stars are the fundamental building blocks of our universe. Most stars host planets, like our sun hosts our solar system, and ...

Mars gets lost as it sinks deep into the sun’s afterglow. Meanwhile, Jupiter climbs above the predawn eastern horizon to join brilliant Venus.

An ‘interstellar visitor’ spotted drifting into our solar system weeks ago is either a massive dirty snowball or an alien ...

The star L 98-59 is only 35 light years away, and several interesting exoplanets have already been found there. Now a ...

More recently, astronomers have proposed a theory for its volatile nature, which explains the star's seemingly erratic ...

The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Photographing the sun can be an amazing experience and this guide explains how to do it in safety with a camera or telescope.

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Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our understanding of how planets take shape — not only in our solar system, but ...

The star is surrounded by a protoplanetary disk, and this disk is the first evidence of debris condensing into what will ...

Pope Leo XIV on Sunday called astronaut Buzz Aldrin and visited the Vatican's astronomical observatory in Castel Gandolfo to ...