Spatial quest

Planets, stars and galaxies

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astronaute escaping from Mars gravity

How strong is gravity on Mars?

Although very close to planet Earth, Mars has very little in common with our planet. In particular, the gravity on Mars is much weaker than on Earth. Understanding the impact of the gravitational forces on [...]

Are we aliens who have come to colonize Earth?

Creasy 19th century theories claim that the earliest forms of life came from the colonization of living organisms from space. Basically, the meteorites that smashed the Earth billions of years ago would have transported the [...]