... the planet Mercury is being pelted regularly by bits of dust from an ancient comet ... year, our planet passes through streams of dust left behind by comets, leading to a ...
... passage of the Earth through dense regions of material sometimes called dust trails on account of their long, narrow structure ... Each dust trail consists of solid particles released at a single return of the stream's parent comet to perihelion. ...
... RCB stars offer the astronomer a wealth of information, from their spectacular fadings, through their pulsations and dust shells, to the nuclear waste on their surfaces that traces previous evolution. ...
... During each passage of the Sun, the comet emits a stream of dust and small particles, which can remain coherent for centuries, before dispersing. ...
... Asher remains a member of the Scientific Organising Committee of IAU Commission 22 (Meteors, Meteorites and Interplanetary Dust), the IAU Working Group on Near-Earth Objects, the Council of the IMO (International Meteor Organization) and the Editorial ...
... by small (millimetre to centimetre size) dust grains in space called meteoroids ... The dust grains run into the Earth s atmosphere at a typical speed of around 35 ... The largest dust grains can produce exceptionally bright and sometimes colourful ...
... Star Formation and Magnetohydrodynamics: one begins with clouds of molecules and dust....... one generates jets, shocks, turbulence, disks and protostars........... and one ends up with stars and planets. ...