/u/acetryder's posts in /r/askscience

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If it is believed that Mars lost its atmosphere because it lost its magnetic field & lost its protection against solar winds/storms, why does Venus have such a thick atmosphere since it too has no intrinsic magnetic field to protect from the sun & is closer to any solar storm?

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If gas giants need a lot of gravity to form, how did enough gas coalesce together? Also, given the enormous gravity, could I travel straight through one if I some how could withstand the gravity, potential heat, lack of breathable air, etc?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If it is believed that Mars lost its atmosphere because it lost its magnetic field & lost its protection against solar winds/storms, why does Venus have such a thick atmosphere since it too has no intrinsic magnetic field to protect from the sun & is closer to any solar storm?	23
If gas giants need a lot of gravity to form, how did enough gas coalesce together? Also, given the enormous gravity, could I travel straight through one if I some how could withstand the gravity, potential heat, lack of breathable air, etc?	1