Dark matter clumps in galaxy clusters bend light surprisingly well0
- From Around the Web, Space
- September 15, 2020
Not only is the mysterious substance invisible, but it’s also not all where we thought it was
Not only is the mysterious substance invisible, but it’s also not all where we thought it was
Venus, the Evening Star, may gleam prettily in our night sky, but up close it’s about as inhospitable as a rocky planet can be, with sulphuric acid rains, a suffocating CO2 atmosphere, and a surface atmospheric pressure up to 100 times greater than Earth’s.
The agency announced it is buying lunar soil from a commercial provider as part of a technology development program
The mysterious dark vacuum of interstellar space is finally being revealed by two intrepid spacecraft that have become the first human-made objects to leave our Solar System.
On a fine scale, the Universe seems lumpier than it should be.
Astronomers from NSF’s National Solar Observatory (NSO) will play important roles in two of five concept studies recently announced by NASA. These five endeavors have each been granted $1.25 million by the Heliophysics division of NASA to investigate the feasibility of cutting-edge missions to study the Sun and its connection to Earth.
Observations by the NASA/ESA Hubble Space Telescope and the European Southern Observatory’s Very Large Telescope (VLT) in Chile have found that something may be missing from the theories of how dark matter behaves. This missing ingredient may explain why researchers have uncovered an unexpected discrepancy between observations of the dark matter concentrations in a sample of massive galaxy clusters and theoretical computer simulations of how dark matter should be distributed in clusters. The new findings indicate that some small-scale concentrations of dark matter produce lensing effects that are 10 times stronger than expected.
A new study published this month in JGR Planets posits that the major particle ejections off the near-Earth asteroid Bennu may be the consequence of impacts by small, sand-sized particles called meteoroids onto its surface as the object nears the Sun. The study’s primary author is Southwest Research Institute scientist Dr. William Bottke, who used data from NASA’s OSIRIS-REx mission.
To the surprise of many planetary scientists, the oxidized iron mineral hematite has been discovered at high latitudes on the Moon.
Scientists study the chemical composition of meteorites.