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What is leo's dimmest star?

The dimmest star in the constellation Leo is generally considered to be Wolf 359. It is a red dwarf star located approximately 7.8 light years away from Earth and is known for its low luminosity.


What is the relationship between the absolute magnitude and luminosity of a celestial object?

The absolute magnitude of a celestial object is a measure of its brightness as seen from a standard distance, while luminosity is the total amount of energy a celestial object emits per unit time. The relationship between absolute magnitude and luminosity is that a higher absolute magnitude corresponds to a lower luminosity, and vice versa. In other words, the absolute magnitude and luminosity of a celestial object are inversely related.


What is the term for the tiny and very dense white dwarf star that is left behind after a supernova?

I think that's a pulsar.


Do the dwarf planets have moons?

Yes, for example Pluto is a dwarf planet and it has three moons. Eris also has a moon.Yes of the 5 named dwarf planets :-Pluto has 3 called Charon its largest then Nix and HydraEris has 1 called DysnomiaHaumea has 2 called Hi`ika and NamakaOnly MakeMake and Ceres have no moons


What is the difference between Planets and Dwarf Planets?

As you might guess, it's partly an issue of size, with dwarf planets being smaller. But just how big does a planet need to be to become a full-fledged planet instead of a dwarf? You might think the minimum size requirement is arbitrary, but the size cutoff is actually based on other properties of the object and its history in the Solar System. Both planets and dwarf planets orbit the Sun, not other planets (in which case we call them moons). Both must be large enough that their own gravity pulls them into the shapes of spheres; this rules out numerous smaller bodies like most asteroids, many of which have irregular shapes. Planets clear smaller objects out of their orbits by sucking the small bodies into themselves or flinging them out of orbit. Dwarf planets, with their weaker gravities, are unable to clear out their orbits.