Elongation is the angle, in degrees, between the Sun and the planet as seen from here on the Earth. Superior planets (those that lie further from the Sun than us: Mars, Jupiter, Saturn, Uranus, ...

Ever since astronomers started staring through their telescopes, they have been trying to measure the size of the stars. It is an almost impossible job. Stars are so far away that even in the biggest ...

Using the unique capabilities of telescopes specialized on cosmic gamma rays, scientists have measured the smallest apparent size of a star on the night sky to date. The measurements reveal the ...

ABOUT fifteen years ago I was looking at Venus through a 40-inch telescope, Venus then being very near the Moon and of a crescent form, the line across the middle or widest part of the crescent being ...

IT will probably occur to most of your readers, as it immedidiately suggested itself to me, on reading in your journal of the 5th inst. a description from Les Mondes of a remarkable meteorite observed ...