Astronomy

In a new paper published today in Nature, Jennifer Bergner and Darryl Seligman suggest that the peculiar acceleration observed for the first known interstellar object `Oumuamua, can be explained if `Oumuamua was made of water ice which was partly dissociated into hydrogen by cosmic-rays along its interstellar journey. In the…

“Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment.” – Buddha On March 23, 1989, a 300-meter wide asteroid called 4581 Asclepius flew past the Earth by a distance of about 684,000 kilometres, and almost missed striking it by a…

In a 1957 paper, the cosmologist Hermann Bondi considered the possibility that an object with a negative mass would create a repulsive force of gravity. When placed next to a positive mass, it would repel it but the positive mass would attract the negative mass. If the two masses are…

Comet 46P/Wirtanen is now quite visible from Earth even with the naked eye and is all the more accessible to observation through amateur telescopes. In connection with this many people have questions, why in photos taken by amateur astronomers a comet is green, but in the Hubble telescope photo it…

An Apollo asteroid is approaching earth at full speed and it may hit us this very weekend. It has been discovered on February 18th and is the size of a hockey field. 2023 DZ2 is an asteroid from the Apollo family of asteroids. Its emergence to our planet was not…