101 Must know the things of the world: Voice I

As the name suggests, Leo I belongs to the constellation Leo the Lion. This is a good example of the deep sky of a dwarf spheroidal mirror. They are fragile, have little soil, and do not form new stars. Typically, they are seen as satellites orbiting larger galaxies – more than 30 of the 59 recorded satellites of the Milky Way are dwarf spheroidal mirrors.

Leo I is about 820,000 light -years away and is the fourth most distant galaxy in our galaxy. It has a diameter on the order of 2,000 light -years and a mass of 25 million Suns. American astronomer Albert George Wilson was spotted in the 1950s looking at a photograph taken by a 48-inch Schmidt box at the Palomar Observatory.

Astronomers believe Leo I is the youngest of the dwarf spheroidal phases of the Milky Way. None of its stars are more than 10 billion years old, and most of them were formed between 2 billion and 6 billion years ago. And no stars (or even a small number) were formed billions of years ago. Because about a billion years ago, Leo I came very close to the Milky Way. The gravitational pull of our larger galaxy may have consumed all the gases available to make stars.

Although it is easy to see Leo, it is not easy to look at. To locate it, point your telescope 20 ‘north of magnitude 1.3 Regulus (Alpha [α] Leonis). Unfortunately, even the brightness from that star (even if the low is high) can cover the small brightness of Leo I, which has a magnitude of 11.2. That dim light is reduced again, spread over a 10 ‘by 7’ area.

The best strategy would be to put Regulus outside the field of vision to the south. Start with a low eye and work your way up to get the best insight.


Be sure to be careful Astronomy’s full list of 101 cosmic objects you can see. New ones will be added every week in 2022.

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