Bouncing boulders on Comet 67P

A 67P Churyumov-Gerasimenko update by Melanie Davies FRAS In September 2019, at a major planetary sciences conference (EPSC-DPS), scientists lead by Jean-Baptiste Vincent presented evidence of curious bouncing boulders on Comet 67P/Churyumov-Gerasimenko. EPSC-DPS is the joint meeting of the European Planetary Science Congress and the Division of Planetary Sciences, and last year was held in Geneva,Continue reading “Bouncing boulders on Comet 67P”

The Pleiades

Bringing a little sparkle to the autumn nights. The Pleiades is an open star cluster in the constellation of Taurus. This enigmatic group of stars is known by many names; the Seven Sisters, Messier 45, and Melotte 22 to name but a few. The Pleiades rise in the east just after sunset from the beginning ofContinue reading “The Pleiades”

A shattered lunar landscape

Astronomers using gravity maps from NASA’s twin GRAIL (Gravity Recovery And Interior Laboratory) satellites have discovered that the Moon’s upper crust – the megaregolith –  is highly porous. The GRAIL satellites, Ebb and Flow, determined the Moon’s gravity field by measuring tiny movements of the spacecraft due to the push and pull of gravity uponContinue reading “A shattered lunar landscape”