1. GSLV satellite
2. PSLV satellite
I don't know of any planet with exactly 21 known moons. The best answer is probably "Uranus" with 27 moons (natural satellites).
Mars has two known natural satellites, Phobos and Deimos. They are irregularly shaped and thought to be asteroids captured by Mars' gravity.
Some known satellites for Mars include Phobos and Deimos. Phobos is the larger and closer of the two, while Deimos is smaller and farther away. Both satellites are irregularly shaped and are thought to be captured asteroids.
Mercury does not have any known natural satellites or moons. It is one of the few planets in our solar system that does not have a moon orbiting around it.
Mercury, Venus, Earth, Mars, Neptune and Pluto.
I don't know of any planet with exactly 21 known moons. The best answer is probably "Uranus" with 27 moons (natural satellites).
As far as is known: -- Neither Mercury nor Venus has any natural satellites. -- Earth has one -- Mars has two
Mars has two known natural satellites, Phobos and Deimos. They are irregularly shaped and thought to be asteroids captured by Mars' gravity.
Some known satellites for Mars include Phobos and Deimos. Phobos is the larger and closer of the two, while Deimos is smaller and farther away. Both satellites are irregularly shaped and are thought to be captured asteroids.
Neptune has 13 known satellites to this date.They are:NaiadThalassaDespinaGalateaLarissaProteusTritonNereidHalimedeSaoLaomedeiaPsamatheNeso
There are no known satellites of Mercury.
Venus is one of the few planets that doesn't have any satellites orbiting around it. Venus also is a planet with no moons.
Venus has no known natural satellites or moons.
Mercury does not have any known natural satellites or moons. It is one of the few planets in our solar system that does not have a moon orbiting around it.
well, all planets have different numbers of satellites... if you start from first planet Mercury, it has no natural satellite. Venus is also free of that.. Earth has one big that we can see and its called Moon or Luna(Greek for Moon) but astronomer say that earth has more than one, probably seven or some say two. Mars has two, Jupiter has 63 known satellites to date (including biggest satellite in solar system Ganymede) , Saturn has 60 to 62, Uranus has 27 known satellites, Neptune has 13 known satellites and Pluto has 3 (Not a planet anymore though)
Venus has no known natural satellites (moons).
Venus has no known natural satellites or moons.