An interest in astronomy may strike early in life or later. Regardless of what lit the fire of that interest, you need ...

Small black holes making a meal out of companion stars are surprisingly messy eaters, astronomers using a Japanese space ...

A full moon is slated for Sept. 7, but there are other celestial events occurring this month. More on viewing Saturn at its ...

Planetariums around the world are invited to participate in this year’s edition of the IAU’s annual outreach event.

It's … the Eye of Sauron! Well, sort of. Though the image you're seeing bears a striking resemblance to the jarring symbol ...

Planck's constant reveals the quantum world's fundamental energy levels. It shows how light and matter exist in discrete units (quanta). This constant defines limits to our knowledge of particle ...

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. The confusion arises from the “year” that comes at the ...