Live data from Hacker News

How Big is Space?

bbc.com

61–70 of 95 posts

Re: How Big is Space?

#61
post #37

It's only the solar system, but it's still a long walk to Pluto: http://www.jeffreybennett.com/model-solar-systems/colorado-s... Models like that get across the incredible amounts of space in space.

Definitely. There's one in Ithaca NY as well. They are pretty simple to do, I wish there were one in every town.

https://en.wikipedia.org/wiki/Sagan_Planet_Walk

Re: How Big is Space?

#63
post #37

It's only the solar system, but it's still a long walk to Pluto: http://www.jeffreybennett.com/model-solar-systems/colorado-s... Models like that get across the incredible amounts of space in space.

[deleted]

Re: How Big is Space?

#64
post #12

One thing that bothers me is that charts/apps like this have to use logarithmic scale due to obvious reasons, but log scale is just not very effective for most people to comprehend on an intuitive level. In the last section each pixel is 1,000,000km, and the first section each pixel represents 1 meter, but experience wise it doesn't make the last section feel that much bigger, and I still have to keep looking at the…

The sine wave down the middle of the page helps with visualizing the changing scale. If you want a linear scale, maybe you will appreciate this page: http://joshworth.com/dev/pixelspace/pixelspace_solarsystem.h...

I was looking for this exact link and Josh's site seems down(HN effect :))..

that page lets you appreciate the vast emptiness within which we live..

this link gives some extra details until the page is up http://gizmodo.com/this-scale-model-of-the-solar-system-will...

plus some great links in the comments.

Re: How Big is Space?

#65
post #45

Earlier quoted context omitted.

So a photon can get anywhere it wants instantly to them?

This is a great article (for laypeople, it's not supposed to be too technical) that explains it and makes it easy to understand: http://zidbits.com/2011/04/why-cant-anything-go-faster-than-... I'll quote the relevant bit, " Imagine for a moment that you are a happy little photon created by a star in another galaxy some 4 billion light years away. From my perspective here on Earth, it took you exactly 4 billion years…

It's super interesting that the speed of light is exactly 282,xyz (can't remember) miles per second. What're the chances? I'm just unable to comprehend the idea that a fundamental universal constant could be an exact whole number amount of an arbitrary measurement unit like that. You'd think there'd be a few decimal points or something.

Re: How Big is Space?

#66
I love this and show it to everyone I know. They've updated the graphics since I last saw it so I get to show everyone all over again.

Almost everybody is surprised when they learn how close to earth the ISS' orbit actually is. They look at me funny, well, some do, the barbarians, when I point out that it is in LOW-Earth Orbit after all and the pictures and video of Earth shot from the ISS vs. photos of Earth from the moon show that the station orbits very close to Earth indeed. Some people have no sense of awe and wonder... :/

Re: How Big is Space?

#67
Was anyone else surprised to learn that the US tested a nuclear explosion (Argus III) at a distance comparable to somewhere between the International Space Station and the Hubble Telescope?

Re: How Big is Space?

#68

Earlier quoted context omitted.

This is a great article (for laypeople, it's not supposed to be too technical) that explains it and makes it easy to understand: http://zidbits.com/2011/04/why-cant-anything-go-faster-than-... I'll quote the relevant bit, " Imagine for a moment that you are a happy little photon created by a star in another galaxy some 4 billion light years away. From my perspective here on Earth, it took you exactly 4 billion years…

It's super interesting that the speed of light is exactly 282,xyz (can't remember) miles per second. What're the chances? I'm just unable to comprehend the idea that a fundamental universal constant could be an exact whole number amount of an arbitrary measurement unit like that. You'd think there'd be a few decimal points or something.

You're misremembering. The speed of light in miles per second is ~186,282.396. The speed of light in meters per second is 299,792,458, but the meter is defined using the speed of light:

https://en.wikipedia.org/wiki/Speed_of_light

Re: How Big is Space?

#69

I prefer the interactive solar system on Josh Worth's site. http://joshworth.com/dev/pixelspace/pixelspace_solarsystem.h...

Seconded, but it appears to be down now. The great thing about that one is it treats the Moon as one pixel and doesn't change scale.

And it has a cool light speed mode in the bottom right which really drives home the fact that even traveling at light speed isn't enough to get humans very far.

Re: How Big is Space?

#70
post #31

Earlier quoted context omitted.

It's worth to do a linear scale miniature of the solar system. At the 1:10^9 scale, it fits well within a farm or a big park, all the planets are at a viable size, and the Sun is not too big.

That could make for a cool park. I imagine you'd have clear line of sight between the planets (either by having a clear path between or by raising them up on monuments), and telescopes setup at each planet in such a way that visitors could look at the other planets without people getting in the way. The Sun would be 1.5 meters across, the Earth would be 1.2 centimeters across, and the whole thing would be 4.5 km from…

It would be a very boring park.
Post reply on HN