Find out what's up in your night sky during January 2025 and how to see ... The “sisters” are medium-bright, hot blue stars named Asterope, Merope, Electra, Maia, Taygeta, Celaeno, and Alcyone.

So it can be seen slowly moving across the entire night sky with respect to the background stars—and it’s therefore Earth’s changing position in the solar system that is the biggest factor ...

If you gaze at the night sky on a clear night ... smattering of so-called "blue lurkers." This term, coined by Leiner and her team, describes 11 puzzlingly young stars in M67, which were also ...

I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes in the northern hemisphere).