What are the red stars in the sky?

When you look up at the night sky, some stars may appear as if they are sparkling blue or red.

These red-colored spots are red dwarf stars, also called M dwarfs.

Red dwarf star Mu Cephei


Red dwarf star Mu CepheiPhoto credit: Getty

What are the red stars in the sky?

Here’s a complete list of the brightest red stars visible in the night sky with the naked eye, binoculars, or a telescope.

These can be found everywhere from the constellations Taurus and Sagittarius to Orion and Canis Major.

  • Arcturus
  • VY CMa
  • Mu Cephei
  • RW Cephei
  • VV Cephei A
  • Gacrux
  • WHERE G64
  • Rasalgethi
  • Betelgeuse
  • S Persei
  • VX Sagittarius
  • antares
  • UY Scuti
  • 119 Tauri
  • Aldebaran

Because of its color, Antares is often confused with Mars.

Why do some stars in the sky look red?

The reason stars are different colors—some are red or blue—is because of their temperatures.

Red stars are cooler than blue stars.

The cooler the star, the longer the wavelength of the light it emits.

Cooler stars are red or red-brown, so longer wavelengths.

While the hottest colors are blue or blue-white because of their shorter wavelength of light.

Are red stars rare?

Red dwarfs are not uncommon.

In fact, they are considered to be the most common type of star in the universe.

They are the most common type of star in our galaxy, making up more than 75 percent of the 200 billion stars in the Milky Way, according to NASA.

Although they are born in much larger numbers, astronomers also estimate that red stars have a lifespan of trillions of years.

This means that some red dwarfs have been around for almost the entire age of the universe.

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Alley Einstein

Alley Einstein is a USTimesPost U.S. News Reporter based in London. His focus is on U.S. politics and the environment. He has covered climate change extensively, as well as healthcare and crime. Alley Einstein joined USTimesPost in 2023 from the Daily Express and previously worked for Chemist and Druggist and the Jewish Chronicle. He is a graduate of Cambridge University. Languages: English. You can get in touch with me by emailing Alley@ustimespost.com.

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