12 Cool Facts about Space

1.Any free-moving liquid in outer space will form itself into a sphere, because of its surface tension.

2.Mercury, Venus, earth and Mars are called the inner planets as they are closest to the sun!

3.If you shouted in space even if someone was right next to you they wouldn't be able to hear you.

4.One Day on the planet Pluto is about the length of a week on Earth.

5.The first man-made satellite in space was called sputnik.

6.Venus is the only planet that rotates clockwise.

Space

7.The space age began on the 4th October 1957.

8.A day in Mercury lasts approximately as long as 59 days on earth.

 9.The stars in each constellation are named after a Greek alphabet.

10.Earth’s atmosphere is the only atmosphere discovered till date that human can breathe in.

11. Earth’s atmosphere was formed from gases pouring out from volcanoes.

12.Jupiter has no surface for a spacecraft to land on because it is made mostly from helium gas and hydrogen.
 The massive pull of Jupiter’s gravity squeezes the hydrogen so hard that it is liquid.

Planet

What are planets?


A “planet” is an object in orbit around the Sun that is large enough (massive enough) to have its self-gravity pull itself into a round (or nearly round) shape. In addition a “planet” orbits in a clear path around the Sun – there are no other bodies in its path that it must sweep up as it goes around the Sun. Source: iau.org

Solar System consist of the sun together with the nine planets and all other celestial bodies that orbit the sun.

The sun is located in the center of the Solar System.The nine planets that revolves around the sun are  Mercury, Venus, Earth, Mars, Jupiter, Saturn,Uranus, Neptune and Pluto. Image:tx.english-ch.com
Easy ways to remember the order of the planets
From enchantedlearning.com i learned this to memorise the order of the planets."My Very Easy Method Just Simplifies Us Naming Planets" The first letter of each of these words represents a planet - in the correct order. 


Solar system is made up of two parts:
The Inner Solar system contains the inner planets and the Outer Solar system contains the outer planets.


The inner planets( Mercury, Venus, Earth, and Mars)are relatively small  and orbit closer to the sun.
The outer planets(Jupiter, Saturn, Uranus, Neptune, and Pluto-a dwarf planet)are mostly huge,gaseous and orbit far from the sun.