Category: Kids Stuff

Dec 13

How will we finally image the event horizon of a black hole? : By Ethan Siegel

  Image credit: NASA/CXC/Amherst College/D.Haggard et al., of the galactic center in X-rays. One hundred years ago, Albert Einstein first put forth his theory of General Relativity, which laid out the relationship between spacetime and the matter and energy present within it. While it successfully recovered Newtonian gravity and predicted the additional precession of Mercury’s …

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Nov 16

Our Solar System Is Almost Normal, But Not Quite : by Ethan Siegel

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  Images credit: NASA / Kepler Dan Fabricky (L), of a selection of the known Kepler exoplanets; Rebecca G. Martin and Mario Livio (2015) ApJ 810, 105 (R), of 287 confirmed exoplanets relative to our eight solar system planets. It was just over 20 years ago that the very first exoplanet was found and confirmed …

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Aug 12

Droughts, Floods and the Earth’s Gravity, by the GRACE of NASA

Image credit: NASA Earth Observatory image by Jesse Allen, using GRACE data provide courtesy of Jay Famigleitti, University of California Irvine and Matthew Rodell, NASA Goddard Space Flight Center. Caption by Holli Riebeek.     By Dr. Ethan Siegel When you think about gravitation here on Earth, you very likely think about how constant it …

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