Entries by mary WAMBUGU

Comets and asteroids have highly elliptical orbits, and many also have orbits that are highly inclined relative to the Ecliptic. In contrast, planets have more circular orbits that lie close to the Ecliptic. Explain how comets and asteroids came to have such irregular orbits, and why this is something that we should potentially be concerned about.

Comets and asteroids have highly elliptical orbits, and many also have orbits that are highly inclined relative to the Ecliptic. In contrast, planets have more circular orbits that lie close to the Ecliptic. Explain how comets and asteroids came to have such irregular orbits, and why this is something that we should potentially be concerned […]

 

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All of the following statements about the atmosphere of the early Earth are correct, except one.

All of the following statements about the atmosphere of the early Earth are correct, except one. Which statement is incorrect? The earliest atmosphere was probably mainly hydrogen and helium, but the Earth’s weak gravity could not keep those gases from escaping. The early atmosphere is thought to have been blown away by the solar wind. […]

 

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