Search found 631 matches

by dougettinger
Tue Mar 23, 2010 2:51 pm
Forum: The Library: Information Desk and Educational Resources
Topic: Binary stars in a supernova explosion.
Replies: 7
Views: 1353

Re: Binary stars in a supernova explosion.

Thank you, Wayne. I think what I am hearing is that the orbit of the non-exploding star is changed, but nevertheless, preserved. Do any calculations exist that predict that a star the size of our Sun would not be disintegrated or be ejected from the gravity field of the remnant of its sibling explod...
by dougettinger
Tue Mar 23, 2010 2:34 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Formation of the Moon
Replies: 34
Views: 3737

Re: Current accepted theory for the Moon-Earth system.

Thank you, RJN, Chris, and Wayne, for your thoughtful and insightful replies. I did not know that Wikipedia wrote a synopsis for the "giant impact hypothesis". I wish to address issues with the Asteroid Belt once again. If Jupiter's gravity field perturbs and prevents the asteroids from co...
by dougettinger
Fri Mar 19, 2010 2:50 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Formation of the Moon
Replies: 34
Views: 3737

Re: Current accepted theory for the Moon-Earth system.

One can safely assume that two or more blasted chunks of collisional material are unusually large and may create separate point sources for new gravity fields for a new forming satellite. It is difficult to conceive only one point source for a new gravity field being created after this hypothetical ...
by dougettinger
Thu Mar 18, 2010 4:35 pm
Forum: The Library: Information Desk and Educational Resources
Topic: Massive blue giant stars after the first 700 million years.
Replies: 8
Views: 1504

Massive blue giant stars after the first 700 million years.

As the known universe began to expand and fermions were created after the first 700 million years after the Big Bang - what is the predicted average spacing of the first stars and their predicted average size? In addition, does any hypothesis exist to predict the number of cycles for the repetition ...
by dougettinger
Thu Mar 18, 2010 4:26 pm
Forum: The Library: Information Desk and Educational Resources
Topic: Binary stars in a supernova explosion.
Replies: 7
Views: 1353

Binary stars in a supernova explosion.

What is the current hypothesis for explaining what happens when one star of a binary or tertiary family becomes a supernova? Does the non-exploding star(s) maintain an orbit around the supernova remnant, or are they expelled along with the ejected matter, or do they disintegrate and diffuse into the...
by dougettinger
Thu Mar 18, 2010 4:08 pm
Forum: The Asterisk Café: Discuss Anything Astronomy Related
Topic: Formation of the Moon
Replies: 34
Views: 3737

Current accepted theory for the Moon-Earth system.

How is it possible that the collisional material created by the Earth and a hypothetical body the size of Mars could possibly accrete to form the Moon? Would not most of this material eventually fall back to Earth, be collected at Lagrangian points, or simply remain as collisional material in orbit ...