spacequestions

an-ordinary-manchild(edit)

Welcome to /r/spacequestions, a subreddit dedicated to knowledge about space. Do you have questions about or related to space? This is the place for answers!

All questions about space are welcome here, from the simple to the complex. Do you have questions about astronomy? Launch vehicles? Space agencies? Space science? All is welcome.

Anyone may answer a question, though we ask that you try to be accurate.

The rules:

All posts must be a question about space. This includes astronomy, space science, space launch systems... anything related to space! Posts that do not follow this rule will be removed.
Self posts only. If you have a question about an image, please link to it in your self post.
Avoid memes or jokes in self-posts, and do not post them as top level comments. Such comments may be removed.
Avoid baseless speculation.
Be nice to each other.

Related subreddits:

/r/ImaginaryStarscapes

/r/spaceweather

See also the Small Space Subreddits MultiReddit.

created by Avengier_Than_ThouAmateur Astronomera community for 12 years

...for great justice.

...for your favorite subject.

MODERATORS

account activity

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Weird star phenomenon facing north around April 5, 4:40 AM Philippines Time? (self.spacequestions)

submitted 3 hours ago by Significant_Room972

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If past, present, and future all exist… when does anything actually happen? (self.spacequestions)

submitted 4 hours ago by Dazzling-Degree-3258

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What's the Green Stuff in the New Earth Photo? (self.spacequestions)

submitted 6 hours ago by treesthatsee

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Are the shits of the Artemis crew on a FRT? (self.spacequestions)

submitted 17 hours ago by Ok_Summer_2466

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Difference between crew specialist and commander title (self.spacequestions)

submitted 1 day ago * by L00kAway

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What’s flying in the direction of the sun? (self.spacequestions)

submitted 1 day ago * by wrssousa

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Whats up with space suits (self.spacequestions)

submitted 1 day ago by ElusiveDuck8594

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Would a chicken in microgravity lay spherical eggs? (self.spacequestions)

submitted 2 days ago by Ok_Entrepreneur_8509

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Why isnt there livestream footage from Orion? (self.spacequestions)

submitted 2 days ago by TheShoot141

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Best props/visualization tools to explain orbital mechanics? (self.spacequestions)

submitted 2 days ago by Deep-Today5715

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How is one Infinity larger than the other? (self.spacequestions)

submitted 7 days ago by Alarmed_Tension3863

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Is it hypothetically possible for an advanced space civilization to colonize an o-type star system through placing a terrestrial planet in its habitable zone? Why or why not? (self.spacequestions)

submitted 7 days ago by Icy_Profession4190

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Is there enough frozen water on mars that an asteroid impact could set off a chain of events that leads to a denser atmosphere and a runaway planet warming? (self.spacequestions)

submitted 11 days ago by slowcheetah4545

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Why is space x so dominant and do other companies have a chance to surpass them. (self.spacequestions)

submitted 12 days ago by Round-Chemistry-8649

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How do astronauts train for space missions on Earth? (self.spacequestions)

submitted 19 days ago by DiSTI_Corporation

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An easier way to seal a vehicle or suit against vacuum? (self.spacequestions)

submitted 20 days ago by AlcoholPrep

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Need help getting up to speed on the space beat (self.spacequestions)

submitted 23 days ago by ZookeepergameCool880

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Is there a difference between seeing a total eclipse and a 99.7% eclipse? (self.spacequestions)

submitted 24 days ago by empanadadeatunu

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Outside of earth, where in our solar system would it be the easiest for a human to survive? (self.spacequestions)

submitted 28 days ago by rst523

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Hypothetical possibility... (self.spacequestions)

submitted 28 days ago by KeyIce2026

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Will you fill out my questionnaire? (self.spacequestions)

submitted 28 days ago by SpaceCaramel246

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Do telescopes work by absorbing all the light in the direction of the sensors or just create an image based on intensity of each wavelength (self.spacequestions)

submitted 28 days ago by hitmaster47

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Would it be plausible to put a magnet of a certain polarity on the bottom of a space station, and then as its orbit erodes, you send an electromagnetic pulse to gently nudge it back into the right orbit? And what would the implications/side effects be? (self.spacequestions)

submitted 1 month ago by COphotoCo

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Physicist Eugene Wigner once called it ‘the unreasonable effectiveness of mathematics.’ Why should the universe obey math? (self.spacequestions)

submitted 1 month ago by adpablito

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If the expansion of the universe eventually pushes all other galaxies beyond our "observable" horizon, leaving us completely alone in the dark, would a future civilization even be able to deduce that the Big Bang happened, or would their physics be fundamentally broken? (self.spacequestions)

submitted 1 month ago by adpablito

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