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View Full Version : How that name was fall "antena galaxy"



suntrack2
2007-Sep-30, 02:59 PM
does that galaxy having two pointers at the top and the bottom, is that a big seperate cluster of stars at the two ends ?

Tim Thompson
2007-Sep-30, 04:05 PM
The Antennae galaxies (http://hubblesite.org/newscenter/archive/releases/1997/34) are so named because somebody decided that the long curving arcs of stars look like the antennae on a bug (http://en.wikipedia.org/wiki/Insect). The stars in the curving streamers have been ejected from the colliding galaxies by the gravitational sling-shot (http://en.wikipedia.org/wiki/Gravitational_slingshot) effect as stars pass close to each other during the collision. Some of them will fall back into the galaxies as they merge, but most of them have escape velocity and will be "lost" to intergalactic space.

suntrack2
2007-Oct-01, 11:15 AM
Hi, Tim Thompson, thanks for the links, I fully understand now that why this name occured "antennae galaxy", infact I spell it antena. Is it correct that the all galaxies are formed into "single dispersion of the matter" during the big bang, and still all galaxies are well expanding.

Sunil

Kaptain K
2007-Oct-02, 02:13 AM
Hi, Tim Thompson, thanks for the links, I fully understand now that why this name occured "antennae galaxy", infact I spell it antena. Is it correct that the all galaxies are formed into "single dispersion of the matter" during the big bang, and still all galaxies are well expanding.

Sunil
No. And no.