Recent comments in /f/space
triffid_hunter t1_j7vd6pd wrote
Reply to Trying to understand light years by [deleted]
> Now if an object is lets say 200 light years away, would it take 200 (Earth years) to travel to said object?
It would take 200 years for photons or other massless particles (eg gravity waves) to travel from there to here or vice versa - but it would take a manmade spaceship hundreds to thousands of millenia because we don't have yet any rocket engines efficient enough to get there faster.
logan5-jessica6 t1_j7vd5p0 wrote
Justifies the huge grants those labs received.
blaster151 t1_j7vcqqc wrote
And can moons have moons? https://academic.oup.com/mnrasl/article/483/1/L80/5195537
Arbusc t1_j7vclb1 wrote
If we assume there are infinite universes, then there is both a net positive and negative 100% chance. You exist in as many universes as you do not.
BuldopSanchez t1_j7vcl05 wrote
Why tag 'importance'? Nature probably doesn't signify importance so much as it does the natural way things happen. Gravity attracts, velocity and trajectory come into play and an object gets trapped into a dance with these three playing the beat and harmony.
Zestyclose_Standard6 t1_j7vcks9 wrote
Reply to comment by sadetheruiner in What are the chances of me existing in another universe? by letsplay123456789
so... about 30% chance?
The_Fredrik t1_j7vckig wrote
Zero.
It might be a copy of you, but it won’t be you since “you” is product of your conscience.
You are not conscious in any a way of any alternative you, meaning they are not you, in an meaningful way of the word.
It be freaking sweet to meet a true doppelgänger though.
[deleted] t1_j7vcjbk wrote
Reply to comment by ClamhouseSassman in What are the chances of me existing in another universe? by letsplay123456789
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beef-o-lipso t1_j7vch38 wrote
Reply to comment by ClamhouseSassman in What are the chances of me existing in another universe? by letsplay123456789
How so?
JimeneMisfit t1_j7vcfkn wrote
I’d say it’s analogous to quantum mechanics- 50/50. It maybe does exist until we observe it, which is why it is an elusive concept to grasp. It’s in the state of existence until we look for it, at which point it no longer exists. As a physics major, I learned to accept that some things are just beyond our limit of perception as human beings. I think if we could somehow detach our consciousness from our mind and be just that - a consciousness without our body (which is bound to this reality), we could see through the proper lens to answer your question. However, we are limited to the physics of our dimension. As Einstein said about quantum entanglement - “spooky action at a distance.” I think the same can be said for multiverses. It’s simply that - a spooky concept that resides a great distance from our reality. Maybe beyond this life, but in this one - its a philosophical theory. I sometimes think this reality would crumble if we could answer such things. I don’t think our minds could handle such a truth.
inventionnerd t1_j7vcdy2 wrote
Reply to comment by Carp8DM in What's the importance of our solar system having so many moons? by [deleted]
Tidal heating is a thing. Jupiter does do a bit of that to it's moons but it's moons also do that to each other.
bookers555 t1_j7vcdlc wrote
Reply to comment by TimeTravelingChris in SpaceX president/COO Gwynne Shotwell says they're attempting Starship's 33-engine static fire test tomorrow, Feb 9. by spsheridan
Bear in mind that even if Starship didnt fly until 2027 it would still be the fastest developed super heavy lift rocket, and the first to be reusable.
If it works, it will leave the Moon just a ticket away.
Lets have patience, the reward will be worth it.
dbarrc t1_j7vcatx wrote
Reply to Trying to understand light years by [deleted]
it would take 200 Earth years of moving at the speed of light, to travel to said object.
holdmeinthedark t1_j7vcarl wrote
Reply to comment by JackBMo in Trying to understand light years by [deleted]
Thank you! This helps me understand things a bit better.
[deleted] t1_j7vc6b0 wrote
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Revolutionary_Lock86 t1_j7vc5rs wrote
Reply to comment by OnlyMortal666 in What's the importance of our solar system having so many moons? by [deleted]
Yeah but there is no thought process or plan… it sounds like you guys are arguing why the solar system decided to get many moons. Cause and effect… that’s it. The universe is incredibly simple.
topcat5 t1_j7vc58y wrote
Reply to Trying to understand light years by [deleted]
You are correct if you are asking if that's how long it would take light to reach those places from the Earth.
Of course there's no known technology that would even begin to allow us to approach those speeds for travel.
[deleted] OP t1_j7vc4f5 wrote
Reply to Trying to understand light years by [deleted]
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blaster151 t1_j7vc4ex wrote
Reply to comment by MuskularChicken in What's the importance of our solar system having so many moons? by [deleted]
At closest approach, I wonder how high you'd have to launch/propel something for it to leave the gravity well of your tiny moon and be sucked into the terrifying vortex of the gas giant. (Come to think of it, how weak would gravity seem on a moon no more than a couple of miles across? How high would you be able to jump and how long would it take to float back down? The mind boggles!)
JackBMo t1_j7vc3lb wrote
Reply to Trying to understand light years by [deleted]
A light year = the amount of time it takes for light to travel in a year. If we could travel at light speed it would take 642 years to reach Betelgeuse. However we can not even come close to those speeds. So it would take a lot, a lot longer.
[deleted] OP t1_j7vc0u0 wrote
Reply to Trying to understand light years by [deleted]
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AlunWH t1_j7vbz9e wrote
Reply to Trying to understand light years by [deleted]
The closest planet outside our solar system is Proxima Centauri B.
Proxima Centauri B is 4.2 light years away. That may not sound that much, but it’s actually about 25 trillion miles. That’s 25,000,000,000,000.
The space shuttle Discovery could travel five miles a second. At 5 miles a second it would take 37,200 years to travel just one light year. One. So Proxima Centauri B is more than a hundred thousand years away for us.
A light year may not sound much, but it’s massive.
Revolutionary_Lock86 t1_j7vbysz wrote
Importance??? We make things important, universe just do. This is the first time I’ve someone humanizing the solar system.
[deleted] OP t1_j7vbwgt wrote
Reply to Trying to understand light years by [deleted]
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Stupid-Idiot-Balls t1_j7vde8j wrote
Reply to comment by Ismellyourpajamas in SpaceX president/COO Gwynne Shotwell says they're attempting Starship's 33-engine static fire test tomorrow, Feb 9. by spsheridan
Ahhh yes, the most successful space company by a large margin, who launches more payload into space than the rest of the world combined, who are testing the biggest rocket ever created which happens to be fully reusable, is becoming a bigger joke everyday.
Critical thinking, my guy.
Their starlink support isn't waning whatsoever by the way, they're just not allowing ukraine to put starlink on weaponized drones. They can still use it the exact same way they've been for the whole invasion.