Tagged: meteors

New interstellar comet discovered - Out of Space

Duncan Steel Sep 13, 2019

Astronomers have searched over many decades for comets that have come from interstellar space, perhaps from a planetary system orbiting a nearby star in the Milky Way. A blank was drawn in this quest for a long, long time… and now, similarly to London buses, two have come along almost at once. The diagram at the head of this post … Read More

Asteroid Day… and what may follow - Out of Space

Duncan Steel Jun 30, 2019

The Tunguska explosion in 1908 was due to the arrival of a small (perhaps 50 metre) cosmic object, quite likely a fragment of a known comet. Astronomers are now wondering whether siblings of that projectile might pass close by the Earth over the next week or so.  I write tonight on Asteroid Day, which occurs on June 30th each … Read More