Discovered last month by a telescope in Chile, the comet known as 3I-Atlas is only the third known interstellar object to ...

This invisible boundary, located about 100 astronomical units (AU) from the Sun (one AU is the distance from Earth to the Sun ...

St. Francis Holy Ghost Catholic School students presented models to classmates, explaining unique features of the planets and the science behind their orbits.

NPR's Ari Shapiro talks with astronomer David Jewitt about what we can learn from the third interstellar object to have entered our solar system, a comet-like object known as 3I/ATLAS.

NASA's interactive map shows the best places and times to watch Monday's total solar eclipse crossing North America.

Discover the dramatic forces creating spectacular weather on neighboring planets and moons. Out in the solar system, the weather gets wacky – with globe-spanning dust storms, monsoons of liquid ...

International astronomers have for the first time witnessed the birth of a planetary system beyond Earth's sun that could one day resemble our own.

It’s probe-ably nothing. The newly discovered Manhattan-sized interstellar object zooming through our solar system has been identified as a comet — but two Harvard scientists argue there is ...

It Came From Outside Our Solar System, and It Looks Like a Comet 3I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the galaxy.