Category: Kids Stuff

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 …

Continue reading

Jul 12

The Invisible Shield of our Sun

  LL Orionis and its heliosphere interacting with interstellar gas and plasma near the edge of the Orion Nebula (M42). Image Credit: Hubble Heritage Team (AURA / STScI), C. R. O’Dell (Vanderbilt), and NASA. By Dr. Ethan Siegel Whether you look at the planets within our solar system, the stars within our galaxy or the …

Continue reading

Jun 13

A Glorious Gravitational Lens

Abel 2218—a gravitationally-lensed cluster of galaxies that is a great target for deep-sky astrophotograhy. Image credit: NASA, ESA, and Johan Richard (Caltech). Acknowledgement: Davide de Martin & James Long (ESA/Hubble). By Dr. Ethan Siegel As we look at the universe on larger and larger scales, from stars to galaxies to groups to the largest galaxy …

Continue reading