Trending Cosmology Discussions

Can something appear from nothing? If no, how did our universe appear? If yes, doesn't this violate the conservation principle? ‎

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Is the universe expanding or are we just able to observe more of it?‎

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How many people have walked on the moon?‎

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Does the universe or solar system have a boundary or outer limit? Does the universe have an edge, and what's beyond it?‎

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How do scientists know what they do about the age and origin of the universe and earth?‎

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Are we unique in the universe, or is there another planet similar to Earth somewhere in the cosmos?‎

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Was gravity strong enough to make cosmic dust collapse in the early universe?‎

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Do you think that the recent discovery of gravitational waves GW150914 will help answer many open questions in physics, or creat other ones?‎

What are your arguments?‎

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We know time is nothing but a distance traveled by an object in space! Then what should be the energy that changing the distance into mass? ‎

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Answer added by  Mahmoud Eltaher
1 year ago

هو يوهانس كيبلر, عالم رياضيات و فلكي و فيزيائي ألماني توصل كيبلر الي استنتاجاته اثناء استخدام ملاحظات براهي الفلكيه الدقيقه ... See More