T. Even people are attracted towards each other by gravity, but this force is so small that it is not noticeable.

F. Gravity doesn’t disappear because someone leaves the Earth’s surface. Every object in space attracted other object by the force of gravity.

The eccentricity is a measure of how much an elliptical orbit is 'squashed'.The formula for eccentricity=distance between foci/length of major axis or.

The telescope observes comets and planets, discovered moons around Pluto, it has helped scientists understand how planets and galaxies form.

These are low altitude satellites. This means they orbit around earth at lower heights. They orbit around the earth in North-South direction.

about 100 min

Proxima Centauri - is actually the nearest star to the Earth.

unwanted objects or material left in space by human activity, such as pieces of destroyed satellite

T. Satellites can be natural, such as the Moon orbiting the Earth. Satellites can also be artificial.

While there are about 2,000 active satellites orbiting Earth at the moment, there are also 3,000 dead ones littering space

Satellites with polar orbits are used for monitoring the weather, military applications (spying) and taking images of Earth's surface

There are eight planets in our Solar System.

October 4, 1957, The world's first artificial satellite was about the size of a beach ball (d=58 cm),from Baikonur Cosmodrome.