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[+]Crensch0 points3 points3 points
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It was almost impossible until we found what's called a standard candle. That is, a way to ensure that twinkling lights out there are at a known quantity of brightness.
We found that standard candle in supernovae. They are all equally bright.
Light disperses at 1 over the distance squared, and with the knowledge of how bright something is supposed to be, and how bright it looks, you can calculate its distance from you.
Fun fact: The lack of standard candles is why Hubble's (the man, not the telescope) calculations were wrong originally, leading to a calculation that the universe was only 1.5 billion years old; younger than the planet was already known to be at the time.
Fun fact: Supernovae are the brightest things in the universe.
Quasars are the brightest objects in the universe, which are generated from supermassive black holes. Although, I don't know if they are in specifically visible light.
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[–] Crensch 0 points 3 points 3 points (+3|-0) ago (edited ago)
It was almost impossible until we found what's called a standard candle. That is, a way to ensure that twinkling lights out there are at a known quantity of brightness.
We found that standard candle in supernovae. They are all equally bright.
Light disperses at 1 over the distance squared, and with the knowledge of how bright something is supposed to be, and how bright it looks, you can calculate its distance from you.
Fun fact: The lack of standard candles is why Hubble's (the man, not the telescope) calculations were wrong originally, leading to a calculation that the universe was only 1.5 billion years old; younger than the planet was already known to be at the time.
Fun fact: Supernovae are the brightest things in the universe.
[–] Rakosman 0 points 1 point 1 point (+1|-0) ago
Quasars are the brightest objects in the universe, which are generated from supermassive black holes. Although, I don't know if they are in specifically visible light.
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[–] Native 1 point 0 points 1 point (+1|-1) ago
Space doesn't exist because we live on a Flat Earth
[–] carlip ago
it's all relative.
[–] TwistedSista ago
Look up, look waaaay up, IT'S FUCKING FAR!!