11–20 of 22 posts
Every atom in your body was forged in a star. The iron in your blood, the oxygen and carbon that make up the proteins and fats that allow complex organisms to exist, the copper and gold we use for wiring, the uranium we're splitting for energy; all of it was made by a star that had used up all its hydrogen and started fusing heavier elements. Nearly all of the energy we use on earth (a small fraction is from nuclear…
Every atom in your body was forged in a star. The iron in your blood, the oxygen and carbon that make up the proteins and fats that allow complex organisms to exist, the copper and gold we use for wiring, the uranium we're splitting for energy; all of it was made by a star that had used up all its hydrogen and started fusing heavier elements. Nearly all of the energy we use on earth (a small fraction is from nuclear…
Used very little, but there's also tidal and geothernal power.
Every atom in your body was forged in a star. The iron in your blood, the oxygen and carbon that make up the proteins and fats that allow complex organisms to exist, the copper and gold we use for wiring, the uranium we're splitting for energy; all of it was made by a star that had used up all its hydrogen and started fusing heavier elements. Nearly all of the energy we use on earth (a small fraction is from nuclear…
Every atom in your body was forged in a star. The iron in your blood, the oxygen and carbon that make up the proteins and fats that allow complex organisms to exist, the copper and gold we use for wiring, the uranium we're splitting for energy; all of it was made by a star that had used up all its hydrogen and started fusing heavier elements. Nearly all of the energy we use on earth (a small fraction is from nuclear…
Although the Webb telephone will be 100x better than Hubble, you gotta wonder if it wouldn't be useful to keep Hubble around for a few more decades. Surely, there's enough work for both.
Although the Webb telephone will be 100x better than Hubble, you gotta wonder if it wouldn't be useful to keep Hubble around for a few more decades. Surely, there's enough work for both.
This is a spurious comment but how neat to be blasted by photons which have travelled for billions of years. I presume, if they're hitting the telescope they're probably hitting me (which does make me feel a little self centered). I wonder how long they will keep traveling? The cosmos have been super interesting lately with those weird formations orbiting one star and the SETI project being refocused on another after…
Earlier quoted context omitted.
How do they know the photons were from billions of years ago?
If an object is measured to be a billion light years away, that means that light from that object takes a billion years to get here.
This is a spurious comment but how neat to be blasted by photons which have travelled for billions of years. I presume, if they're hitting the telescope they're probably hitting me (which does make me feel a little self centered). I wonder how long they will keep traveling? The cosmos have been super interesting lately with those weird formations orbiting one star and the SETI project being refocused on another after…
I couldn't find anything concerning what you said about SETI. Do you have a link I could get?
Sorry coulda documented better!
[0]- http://www.universetoday.com/122971/seti-institute-undertake...