Search found 4 matches

by jjohnson
Wed Dec 05, 2012 7:56 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Plasma Jets from Radio Galaxy Hercules A (2012 Dec 05)
Replies: 58
Views: 13350

Re: APOD: Plasma Jets from Radio Galaxy Hercules A (2012 Dec

For a lucid explanation of how particles can be driven to escape velocities in a wide scale of cosmic objects, from planet to stars, galaxies, quasars, etc., read the article titled "Acceleration of Outflow of Matter From Celestial Objects" by Rickard Lundin (Swedish Institute of Space Phy...
by jjohnson
Fri Jun 04, 2010 11:02 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Hubble Remix: Active Galaxy NGC 1275 (2010 Jun 04)
Replies: 42
Views: 4745

Re: APOD: Hubble Remix: Active Galaxy NGC 1275 (2010 Jun 04)

Regarding the filamentary tentacles of "hot gas" - which NASA explains is a common term for ionized gas, which is matter in the plasma state, whether weakly or wholly ionized. We are looking at a fairly energetic plasma-filled cosmic space. The world's largest professional organization is ...
by jjohnson
Thu Mar 25, 2010 12:16 am
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Galaxy Wars: M81 versus M82 (2010 Mar 24)
Replies: 15
Views: 2973

Re: APOD: Galaxy Wars: M81 versus M82 (2010 Mar 24)

Galaxies are not at "war" with one another. That is just hyperbole based on the movie title, "Star Wars". There is no evidence that gravity waves from one are pounding the other. So far there is not a shred of evidence that there even are gravity waves, as reported regularly from...
by jjohnson
Wed Mar 17, 2010 4:16 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: Phobos from Mars Express (2010 Mar 17)
Replies: 53
Views: 22773

Re: APOD: Phobos from Mars Express (2010 Mar 17)

The grooves are not as unusual as claimed, in that similar constant-depth grooving is observed on rocky bodies with no or only tenuous atmospheres generally. This includes Mercury, our moon, and smaller moons of planets generally. Although resolution of photos of comet nuclei, asteroids, and bodies ...