The Earth in the Solar System Test - 9

The collection of stars, dust and other gases is called galaxy. There are 100 billion of galaxies in our universe. The galaxy of earth is known as the Milky Way. It is also known as Akash Ganga. It is most significant to humans. It is a typical spiral type of galaxy.

Jupiter is the fastest spinning planet in our Solar System rotating on average once in just under 10 hours. That is very fast especially considering how large Jupiter is. This means that Jupiter has the shortest days of all the planets in the Solar System.

• Jupiter,the largest planet in the solar system revolves or orbits around the Sun once every 11.86 Earth years, or once every 4,330.6 Earth days.
  

Saturn moon also known as Titan is largest moon of Saturn and is only known to have a dense atmosphere and also the only object other than Earth and also the only object other than Earth were clear evidence of stable bodies of surface liquid have been found.

Our solar system consists of a star -  the Sun and 8 planets namely Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. There is an asteroid belt between Mars and Jupiter which separates the planets in two regions. The planets towards the Sun i.e. Mercury, Venus, Earth, Mars are inner planets and the other four planets are outer planets.

Although asteroids orbit the Sun like planets, they are much smaller than planets. 

Pluto is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune. It was the first Kuiper belt object to be discovered and is the largest known plutoid.

Pluto was discovered by Clyde Tombaugh in 1930 and was originally considered to be the ninth planet from the Sun. 

Pluto is the largest and second most massive known dwarf planet in the solar system and the ninth largest and tenth most massive known object directly orbiting the sun. 

It is the largest known trans-Neptunian object by volume but is less massive than Eris. Like other Kuiper belt objects, Pluto is primarily made of ice and rock and is relatively small about one-sixth the mass of the moon and one-third its volume. 

It has a moderately eccentric and inclined orbit during which it ranges from 30 to 49 astronomical units from the Sun.

Ursa Major is a prominent constellation in the northern hemisphere. It is the third largest constellation in the sky.

Ursa Major is primarily known from the asterism of its main seven stars, which has been called the “Big Dipper", "the Wagon," "Charles's Wain," or "the Plough," among other names.

Ursa Major covers 1279.66 square degrees or 3.10% of the total sky, making it the third largest constellation.

Ursa Major is visible throughout the year from most of the northern hemisphere and appears circumpolar above the mid-northern latitudes. From southern temperate latitudes, the main asterism is invisible, but the southern parts of the constellation can still be viewed.

The Sun is the star at the center of the Solar System. It is nearly a perfect sphere of hot plasma, with an internal convective motion that generates a magnetic field via a dynamo process.

Its diameter is about 1.39 million kilometers (864,000 miles), or 109 times that of Earth, and its mass is about 330,000 times that of Earth.

The outer layers of the Sun exhibit differential rotation. At the equator, the surface rotates once every 25.4 days, near the poles, it's as much as 36 days. This odd behavior is due to the fact that the Sun is not a solid body like the Earth. Similar effects are seen in the gas planets as well.

• The dwarf planet Ceres is the largest discovered asteroid in the solar system.It is about one-quarter the size of the moon with a diameter of 945 kilometers (about 583 miles).