Tag Archives: astrophysics

What and how: fruits/vegetables and diverting an asteroid

What is the difference between a fruit and a vegetable? You call it a fruit when the part that you eat stemmed from the flower of the plant, then grew around some seeds. This way cucumber, peas, apples, pears and tomatoes are fruits. But what about vegetables? If you eat the root, the leaves or […]

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Did we just discover what dark matter is made of? Maybe sterile neutrinos are the solution!

DNews reports that sterile neutrinos could be the candidates for dark matter. Those are neutrinos that have masses between the electron neutrino (0.3 eV) and muon neutrino (0.115 MeV). In fact, it seems that the sterile neutrino might have a mass of just about 3.55 keV as it gives off X rays in that band […]

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Supermasive black holes: killers and birthers of stars and galaxies

Black holes are able to eat up just about anything that falls into them. You need to see that I mentioned falling, not being sucked in. Today we know that at the center of each galaxy is a supermassive black hole, a black hole that can be hundreds or millions of times the mass of […]

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How do we study the stars?

Well, by analyzing the light that comes from them. We can measure their velocity, how big they are, what type they are, what are they made of. Light or electromagnetic waves are still our best instrument that we use to learn as much as we can about the Universe. How do we know what a […]

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SciShow Space: what is gravitational lensing

Caitlin Hoffmeister, from SciShow Space, explains us what gravitational lensing is. Gravitational lensing is a process through which light gets bent in its path if it goes past a massive object like a star or like a galaxy. An object behind the star of galaxy might be seen even though you do not have direct […]

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Vsauce: quasars can be brighter than the galaxies they’re in – most brightest thing in the Universe explained

Magnitude is a number that tells you how bright an object is, and it can be relative or absolute. Vsauce explores the Universe of absolute magnitude and finds out that the Sun has a magnitude of 4.83, yet a star called R136a1, 256 times more massive than the Sun, has a magnitude of -12.6 and […]

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Alltime10: what’s wrong in “10 Unsolved Mysteries Of Space”?

In the video called “10 Unsolved Mysteries Of Space” from Alltime10 the guys showed great images, great music, but some of the facts are wrong. Can you guess which of them? For the space fans out there the wrong facts simply pop out like supernovae, but I’ll outline here them too. Firstly, the things they […]

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What’s that all about the expansion of the Universe? Do we expand too?

If you won’t get what the video tells us then “Y’all need Jesus”, as the fine lady says. Einstein thought that the expansion of the Universe is a given therefore he considered that we need to add a constant. Constants are certain given values that we need to take “as is” because they keep the […]

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Falling Into Black Holes Revisited: You Can’t Fall Into [sort of]

In an earlier post I wrote that Black holes are cosmic objects so dense that not even light can escape from them if it gets too close. and Dr. Sanford Aranoff, Adjunct Associate Professor of Science and Mathematics at Rider University, told me in a comment that you cannot even reach a black hole stating […]

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