- A common definition of space is known as the “Karman Line” an imaginary boundary of 100 kilometer (62 miles) above mean sea level.
- Neptune was actually observed many times prior to official discovery.
- You can see 9 galaxies in the night sky.
- The planets of the solar system travel with the sun through millions of stars in our galaxy at a speed of about 70,000 kilometer per hours.
- A ‘Comet’ has a tail always point away from the sun.
- Comets are celestial bodies moving around the solar system in elliptical orbits usually accompanied by long shinning tail.
- The term ‘Meteor’ is applied to an interplanetary body after it enters the earth’s atmosphere and explodes in midair as a ball of fire.
- A meteor of very large size which does not get burn completely in Earth’s atmosphere and strikes the surface of the earth is called ‘Meteorite’.
- Meteors are known as ‘Shooting stars’ because when they enter earth’s atmosphere with tremendous speed, they burn due to friction and a streak of light is seen.
- The ‘Cloud of Urt’ is a group of about a million of celestial objects which are beyond the orbit of Pluto.