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Questions and Answers

Can planets in other universes have other shapes?

Questions and Answers

Why is the Greenwich meridian where it is and not in some other vertical position?

Questions and Answers

Are cloud photos taken by geostationary satellites?

Questions and Answers

How do you calculate the orbital period of GPS satellites located at an altitude of 20000 km above the Earth’s surface?

Questions and Answers

Why is the speed of the ISS so high?

Questions and Answers

How much does the ISS cost in total? (in euros)

Questions and Answers

Could it be that the Big Bang took place in an already existing space?

Questions and Answers

What was the universe like before the Big Bang? And was the sun already there?