Astronomers measure a star’s brightness using the apparent magnitude system, where lower values indicate brighter stars.

"In January, you'll have the opportunity to take in four bright planets in a sweeping view" said Preston Dyches of NASA's Jet ...

Adhara is a binary star system approximately 430 light-years from Earth ... stars visible to the naked eye. If people could see in ultraviolet light, Adhara would be the brightest star in the ...

Baker said that there are other astronomical events that may be more interesting than the parade of planets. Baker said Mars ...

As soon as it gets dark, two bright lights become visible—the brightest in the southwest and an almost-as-bright light in the east. What are they?

A once-in-a-lifetime comet is approaching the sun — and it will be visible ... at its brightest. Yang Changshi/VCG via Getty Images The comet will also be at its closest point to the Earth ...

Because planets always appear in a line, the alignment isn't anything out of the norm. What's less common is seeing so many ...

A parade of planets will be visible to skywatchers around the globe through the rest of this month and into February.