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

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 ...

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 ...

Planck’s constant is one of the most important numbers in all of physics. It is, essentially, the ultimate guide to the quantum world. It tells us where quantum effects are important, the ...

My astronomy books are packed, as are many of our belongings. In a few days, I will lose Internet access. We are going through that particularly difficult move: "The Downsize". Then will come the ...