The bright stars Castor and Pollux will be positioned to the left of the moon in the early morning hours of Aug. 19. Mercury, meanwhile, will be visible close to the horizon, but will swiftly become ...

Star clusters are groups of stars that formed together and remain bound by their mutual gravity. They mainly come in two ...

In August, astronomers can observe three prominent star clusters: Hercules, Pleiades, and Hyades. These clusters, comprising ...

Want to spot up to six planets at once in the night sky? Look up before dawn for the second and last "planet parade" of the ...