SnakAstronomy & Astrophysics

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dec 11, 2010, 3:28 pm

A friend sent this link to me:

It's your basic Powers of Ten, but with more examples and details. Enjoy!

dec 11, 2010, 3:47 pm

Lovely. Hard to control the slider, though.

dec 20, 2010, 12:21 am

Very impressive but is there life as we know it?

Redigeret: mar 4, 2011, 9:14 am

#2 - Instead of a mouse or touch pad, try using your left and right arrow buttons.

aug 1, 2020, 6:44 am

Here's a good, clear exposition in layman's terms of the problematic aspects of measurement and its limits when it comes to astrophysics on vast extra-galactic scales.

For example, from the article, our universe is merely the observable part. It's estimated to be about 13.8bn light-years across. But because the universe is expanding and has been all during that time, the expansion has to be estimated and added to that space-time. The result adds another 31.2bn light-years--more than twice the base figure.

Big space | Our planet is a tiny porthole, looking over a cosmic sea. Can we learn what lies beyond our own horizons of perception? | by Katie Mack | Aeon |
31 July 2020


"This Essay is based on Katie Mack’s forthcoming book, The End of Everything: (Astrophysically Speaking) , publishing on 4 August 2020 by Scribner."