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Category Archives: Universe
Earth Measured Relative to the Cosmic Scale
The Universe is an unbelievably vast entity. Earth’s radius is about 6.4*106 meters. In overwhelming contrast to this, the radius of the observable universe is approximately 4.4*1026 meters. That is a difference of 20 orders of magnitude. If the earth’s radius, and the universe as a whole, was scaled down such that the earth was the size of … Continue reading Earth Measured Relative to the Cosmic Scale → Continue reading
Earth Measured Relative to the Cosmic Scale
The Universe is an unbelievably vast entity. Earth’s radius is about 6.4*106 meters. In overwhelming contrast to this, the radius of the observable universe is approximately 4.4*1026 meters. That is a difference of 20 orders of magnitude. If the earth’s radius, and the universe as a whole, was scaled down such that the earth was the size of … Continue reading Earth Measured Relative to the Cosmic Scale → Continue reading
Proxima b
We’ve alluded to exoplanets and habitable zones in class, but you may be wondering just how similar these planets are to Earth – and if we can even get there. Proxima b is a rocky mass larger than Earth that orbits our Sun’s closest neighbor, Proxima Centauri. Astronomers have determined that Proxima b lies in … Continue reading Proxima b → Continue reading
Posted in Class, Exoplanets, Physics, Universe
Tagged astro2110, blog1, lightyears
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The Incredible Scale of the Universe
There’s really no other way to phrase it: the universe is enormous. With our current level of technology, it might as well be an infinite space, but there is a limit to our universe. Our best guess as to the size of the universe right now is that the universe is around 93 billion light … Continue reading The Incredible Scale of the Universe → Continue reading
The Incredible Scale of the Universe
There’s really no other way to phrase it: the universe is enormous. With our current level of technology, it might as well be an infinite space, but there is a limit to our universe. Our best guess as to the size of the universe right now is that the universe is around 93 billion light … Continue reading The Incredible Scale of the Universe → Continue reading
Faster than Expected
The universe is expanding faster than was originally expected. Just recently, NASA has adjusted the Hubble constant to 45.5 miles per second per megaparsec. This translates into a doubling of the size of the universe in 9.8 billion ears. AHHHH crazy! This adjustments is to correct for the increase in speed that the universe is actually … Continue reading Faster than Expected Continue reading
Andromeda and the Size of the Universe
In 2015, Hubble was able to take the most detailed image of Andromeda ever taken. The image had a pixel density of 69.536×22,230 pixels. The picture was taken using 7398 exposures. Images like this really put into light how vast the universe is. In the video, they focus in on a shot of the … Continue reading Andromeda and the Size of the Universe → Continue reading
Black Holes
While the concept of black holes has become a cultural phenomenon thanks to movies such as Interstellar, it still seems like the general public knows very little about them. In order to help clarify any misunderstandings, welcome to a brief introduction on black holes. In essence, a black hole consists of a massive amount of mass […]
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The Fermi Paradox
“Where are they?” asked Enrico Fermi to his colleagues in 1950. Where is all the life that, by all rights, should populate our galaxy and the rest of the universe? The Fermi Paradox arises from the knowledge that the whole of human history is but a blip in the cosmic calendar. If we have so […]
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Astronomy and Us
“I believe our future depends powerfully on how well we understand this Cosmos, in which we float like a mote of dust in the morning sky.” – Carl Sagan Even after learning all of the mysteries, all of the answers, all of the beauty, and all of the chaos of the universe, it is still natural […]
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