I'm an amateur astronomy lover and I have an Orion StarSeeker IV 150 mm, together with a bunch of lenses, which are the following: 1x 23mm (32.6x) and 1x 10mm (75x) wide-field 60-degree eyepieces 1x

I have a 12" dobsonian with a 1500mm focal length and want to do some higher magnification planetary viewing. Currently my highest magnification is ~80x via my 19mm eyepiece (calculated here), but I

Caldera (geology) Dictionary of astronomy, letter C A caldera, in geology, is a large volcanic depression in a more or less circular form. Certain boilers are the result of cataclysmic explosions that destroy the erupting volcano; The volcanic islands of Santorín, in Greece, and Krakatoa, in Indonesia, fall into this category.

Are there any theoretical predictions or "educated speculation" by cosmologists on how matter will be distributed at very, very distant times in the future? For example, will matter be: agglutina…

UPDATE: The on-line simulation seems to be working beautifully now! I'd recommend anyone to go back and take another look to enjoy both the mathematical beauty of orbital mechanics, and the aesthet…

Marshall (space center) Dictionary of astronomy, letter M It is an associated space center of NASA, which is built in Huntsville, Alabama, and in which transporters, spacecraft and scientific satellites are built. It is named after General George C. Marshall, defense minister of the United States and famous author of the post-war European reconstruction plan.