Bouncing boulders on Comet 67P

Close-up of 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

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 of … Continue reading The Pleiades

A shattered lunar landscape

Moon's gravity map

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 upon … Continue reading A shattered lunar landscape