Mar 13
Artist’s interpretation of the Jason 2 satellite. To do its job properly, satellites like Jason 2 require as accurate a terrestrial reference frame as possible. Image courtesy: NASA/JPL-Caltech. By Alex H. Kasprak Flying over 1300 kilometers above Earth, the Jason 2 satellite knows its distance from the ocean down to a matter of …
Feb 14
Images credit: Saturn & the Phoebe Ring (middle) – NASA / JPL-Caltech / Keck; Iapetus (top left) – NASA / JPL / Space Science Institute / Cassini Imaging Team; Phoebe (bottom right) – NASA / ESA / JPL / Space Science Institute / Cassini Imaging Team. By Dr. Ethan Siegel Although Saturn has been known …
Jan 14
Globular Cluster NGC 6397. Credit: ESA & Francesco Ferraro (Bologna Astronomical Observatory) / NASA, Hubble Space Telescope, WFPC2. By Dr. Ethan Siegel Littered among the stars in our night sky are the famed deep-sky objects. These range from extended spiral and elliptical galaxies millions or even billions of light years away to the star clusters, …
