Distances in Space.

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Presentation transcript:

Distances in Space

The speed of light is the fastest speed that could EVER be achieved. The speed of light is 300,000 km per SECOND!! (That’s 186,000 miles per second) Light takes 2 seconds to reach the Earth from the moon - 8 minutes to reach the Earth from the Sun

If you were in a spaceship that travelled at the speed of light and you started a journey from the Sun it would take: about 3 minutes to reach Mercury, 5 minutes to reach Venus, 8 minutes to reach the Earth, 51/2 hours to reach Pluto, 4 years to reach the next star, 5,000 years to reach the edge of the galaxy, 50,000 years to reach the next galaxy, 500,000 years to reach the next Cluster!!

Real rockets do not travel at the speed of light, they travel MUCH slower. The Apollo missions took 4 days to reach the moon - at the speed of light it would have taken 2 seconds!! These rockets were travelling roughly 200,000 times slower than light. At this speed it would take 125 YEARS to get to Pluto!

How far… Earth is 150,000,000 km. away from the sun. Light travels 300,000 km per second So light takes about 8 minutes to reach Earth. Very large distances in space are measured in light years- the distance that light travels in 1 year (9,500,000,000,000,000 km) The next star nearest to Earth (after the sun) is called Proxima Centauri and is 4.22 light years away.

Calculating how long light takes… Light travels at a speed of 300,000,000 m/s. How long does light from the Sun take to reach Earth? (distance of Earth from the Sun is 150 million km) Distance from earth to the sun = 150,000,000,000 meters 300,000,000 150,000,000,000 = 500 seconds (/60 =8.3 minutes)