Regulus Star and Leo I Galaxy

The brightness of Regulus, a quadruple star system, one of which is formed by a giant star, overshadows the dwarf galaxy Lion I, which you see as a faint pile of sand right below the photo.
Star System
The main star that forms the Regulus system, which can be easily observed with the naked eye in the sky at night, is a bright giant star from the B-spectral class with a mass of about 3.8 Sun. The surface temperature of the star, which is about three times the diameter of the Sun, is 2.5 times more than the Sun, and is about 12 thousand degrees Celsius. Therefore, its brightness and the energy it emits is approximately 300 times more than the Sun.

Observations say that this main star, Regulus A, should have a white dwarf mate. However, this white dwarf has not been observed yet.

The other members of the system are a Class K orange star named Regulus B, with a mass of about 80 percent of the Sun, and a class M red dwarf with a mass of 30 percent of the Sun called Regulus C. These two stars are located in an orbit approximately 5,000 astronomical units away from the main star, and the total radiated power emitted by both is only half the Sun.
Leo (Lion) Galaxy I
The Lion I Galaxy, which we can barely choose because of the bright light of the star system, is about 800 thousand light years away from us and our galaxy is known as the most distant satellite of the Milky Way. Due to the bright light of Regulus, it was not possible for us to discover this dwarf galaxy, which contains close to 10 million stars and which we can normally see very easily, until Albert George Wilson discovered hard trouble in 1950.

Aslan I is home to millions of stars. However, the gas cloud resource of this dwarf galaxy that could form new stars has been exhausted billions of years ago. So, almost all of the stars here are old dwarf stars (class M, K and G) and dying red giants.

Unfortunately, the dark sky we describe in this article also applies to intelligent life forms that are likely to exist in this dwarf galaxy.


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