Explore the awe-inspiring differences in star sizes and their powers, ranging from the smallest red dwarfs to the most ...

By Kat Troche As summer deepens in the Northern Hemisphere, a familiar constellation rises with the galactic core of the ...

Bluish-white Regulus in Leo is moving toward the western horizon and sets around 10 p.m. in mid-July, followed a couple of ...

Our satellite hangs out with the heart of the Scorpion, known for its vivid red hue as the Rival of Mars in our sky.

The month of July 2025 is filled with several enjoyable celestial events. The range of events includes the first meteor ...

Depending on the amount of light pollution you’re dealing with, Scorpius has a number of highlights to check off, such as Antares, or the “heart of the scorpion.” The supergiant star has a reddish hue ...

July’s predawn sky offers some rare events, providing another reason to get outdoors to enjoy the relatively cool mornings.” ...

July’s predawn sky offers some rare events, providing another reason to get outdoors to enjoy the relatively cool mornings. Venus, at magnitude -4, is the brilliant morning “star” in the east.

Contrast the red of Mars with Antares. Mars is somewhat past its brightest appearance for a while, but it still is spectacular.

For a really big star astronomers look to Antares, a red supergiant 400,000,000 miles in diameter. All stars are globes of hot gas. Antares is relatively cool, its gaseous density very low.

Though previous studies have imaged convection cells on a few large stars—mainly red supergiants such as Antares, which are much more massive—the R Doradus study was the first to measure their ...

This star is classified as an M-type supergiant, notable for its massive size and cool temperature compared to the Sun. Antares: The brightest star in Scorpius Also known as Alpha Scorpii, Antares is ...