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Herschel and Hubble were astronomers who have had telescopes named after them - Edexcel - GCSE Physics - Question 2 - 2015 - Paper 1
Question 2
Herschel and Hubble were astronomers who have had telescopes named after them. (a) Complete the sentence by putting a cross (✔) in the box next to your answer. The... show full transcript
Worked Solution & Example Answer:Herschel and Hubble were astronomers who have had telescopes named after them - Edexcel - GCSE Physics - Question 2 - 2015 - Paper 1
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Step 2
What is the closest distance between the Moon and the Hubble telescope?
Answer
To find the closest distance, we subtract the average radius of the Hubble's orbit from the average radius of the Moon's orbit:
Closest Distance = Average radius of Moon - Average radius of Hubble = 385000 km - 560 km = 384440 km.
Step 3
Explain why the distance between the Moon and the Hubble telescope changes.
Answer
The distance between the Moon and the Hubble telescope changes because both are in orbit around the Earth. The Hubble telescope follows a much smaller orbit compared to the Moon, which orbits Earth at a larger radius. As both objects move in their respective orbits, the distance between them varies based on their positions, creating changes in relative distance over time.
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Describe what is meant by the Big Bang theory.
Answer
The Big Bang theory describes the origin of the universe as an expansion of space from a very hot and dense initial state. It suggests that all matter and energy in the universe was once concentrated in a singular point, which began expanding approximately 13.8 billion years ago. This ongoing expansion continues to shape the universe today.