The mysterious bright spots on Ceres caused a sensation when the Dawn spacecraft first spied them in 2015. Now, they’re known to be salt deposits from a recent or ongoing percolation of briny water from a large reservoir in Ceres’ interior.
This mosaic image uses false color to highlight the recently exposed brine, or salty liquids, that were pushed up from a deep reservoir under Ceres' crust. In this view of a region of Occator Crater, they appear reddish. Image via NASA/ JPL-Caltech/ UCLA/ MPS/ DLR/ IDA
Recent reports of dramatic declines in insect populations have sparked concern about an ‘insect apocalypse.’ But a new analysis of data from sites across North America suggests the case isn’t proven.
The Texas frosted elfin (Callophrys irus hadros), a small butterfly subspecies found only in Arkansas, Texas, Oklahoma and Louisiana, has lost most of its prairie habitat and is thought to have dramatically declined over the last century. Image via Matthew D. Moran/ The Conversation https://theconversation.com/insect-apocalypse-not-so-fast-at-least-in-north-america-141107
This distant galaxy – SPT0418-47 – surprised astronomers by being organized enough to have a spinning disk and a galactic bulge, early in the history of our universe.
Lensed view of galaxy SPT0418-47. Astronomers using ALMA, in which the ESO is a partner, have revealed an extremely distant galaxy that looks surprisingly like our Milky Way. The galaxy, SPT0418-47, is gravitationally lensed by a nearby galaxy, appearing in the sky as a near-perfect ring of light. Image via ESO https://www.eso.org/public/images/eso2013a/
This visualization by Ian Webster and Peter Jenniskens uses NASA data to render known Perseid meteoroids in space. Don’t miss this!