Recent comments in /f/space

kayak_enjoyer t1_jdtyytj wrote

There was some comet recently where I took my kids and a few friends out to a high, dark spot. We spotted it, with our naked eyes!!

"Is it going fast?" my youngest child asked.

Hella fast. Screaming. Everything is always moving, but it's so far away it appears to be standing still.

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SlowLemurFastLemur t1_jdtwgvx wrote

These are really really good questions.

>So say for example I somehow can live for 10000 years near the black hole,, so then is it safe to say that 1,000,000,000 years have passed on earth?

Yes!

>Lets change the calculation accordingly, to last 100 trillion years on earth, scientists say the big freeze or the death of the universe will occur in 100 trillion years, so If I could somehow find a black hole that can decelerate my time even higher, technically, I could be there 24 hrs and the universe could end?

That's a harder question. I want to say yes. When they say the universe will die they mean that all the energy and matter will break up and be one warm ball of stuff, not structured like we have now. No planets, no stars, just like dirt and heat.

>So then wth is time, isn't the black hole just 24 hrs younger then? While the earth is much more. How do we even define time now? It's all relative to earth time then? Just like countries have individual time, we have time for each black holes then. I guess it's just fascinating to think of it. Do give me your insights and opinions.

That's an excellent question. Time is relative! Time means different things depending on where you are in the universe. When scientists say things like "the earth will end in 100T years" they're giving that number to you in earth years. Time is not all relative to earth but the time you and I care most about, the age of our family and friends, the age of the world, etc. Are relative to earth.

>To think of it, could it be that some organisms perceive time much faster which can survive even on the black hole, lived for one minute and the universe ended? So we could technically find a planet with the least density to slow down time to live longer.

Sure. There could be creatures that live on a massively heavy planet. Their time would advance more slowly than our time and our time would advance more quickly to their time. Time is not an absolute thing it is entirely dependent on context.

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wdd09 OP t1_jdtvjsd wrote

Yup! However, a camera captures much more light than the eye can see which is why the Milky Way appears brighter in this photo than one could see with their naked eye. Edits to the photo are made to bring out the details of the Milky Way Core, which is also why it appears more brilliantly than one can see with their eyes.

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charliehustles t1_jdtsoks wrote

They actually make me feel optimistic for the future. I was a young teen when they came through and vividly remember them. They were amazing and definitely lit a spark in me and my love for astronomy.

While the schedule of known comets close to the grandeur of those two might be light for the next century, I still have faith that we’ll get another surprise great one. Hale Bopp was spotted about 2 years before arrival and Hyakutake came blazing in only 2 months after being spotted. If anything they demonstrated that big guys can just show up from nowhere.

Worst case I’ll hopefully live to 80ish and see Haileys, which of course I’m still sour about, because it last visited when I was a toddler. Too young to remember.

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