In 2017, astronomers made an unprecedented discovery: the first interstellar object ever confirmed to visit our solar system—1I/2017 U1, also known as Oumuamua. This mysterious object, unlike ...

Astronomers at Leiden University have detected rare isotopes of carbon and oxygen in our neighboring stars for the first time ...

Back to Article List Michael’s Miscellany: 25 Questions About Astronomy Test your knowledge with this short quiz about the cosmos.

Before defining what a light-year is, we should define what a light-year is not: It is not a measure of time, but rather a measure of distance ...