STARS AND THE SOLAR SYSTEM

Eight minutes

the distance of the Sun from the Earth may be said to be about 8 light minutes.

The distance of Alpha Centauri is about 4.3 light years.

the speed of light is about 300,000 km per second. Speed of light =3×10^8m/s so = 3×10^5 km/s

light year. It is the distance travelled by light in one year. 1 light year = 9.4607 × 10¹² Km.

The next nearest star is Proxima Centauri. It is at a distance of about 40,000,000,000,000 km from the Earth.

The Sun is nearly 150,000,000 kilometres (150 million km) away from the Earth.

There is actually a star, the pole star, which is situated in the direction of the earth’s axis. It does not appear to move

The Stars There is a large number of stars in the sky. Observe carefully on a dark night and from a place away from a big city. Are all the stars equally bright? Are they of the same colour? In fact, stars emit light of their own. The Sun is also a star. Why does …

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The Moon’s SurfaceThe moon is a fascinating object form poets and story-tellers. But when astronauts landed on the moon, they found that the moon’s surface is dusty and barren. There are many craters of different sizes. It also has a large number of steep and high mountains . Some of these are as high as …

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