by Ann » Thu Apr 05, 2018 4:52 am
I'm so glad to see this galaxy as an APOD, and I'm so glad to see Adam Block get an APOD for one of his galaxy pictures!
:jumping up and down:
NGC 289 is a very, very pretty spiral galaxy. The inner parts of it are very spiral-y and regular and also quite yellow, though with a healthy sprinkling of pink emission nebulas in the arms. The outer arms are blue, relatively faint, and rather irregular.
It is interesting that NGC 289 is interacting with a small companion. Other notable spiral galaxies are also interacting with dwarf satellites, such as
NGC 1512 (seen in the link in a photo from NASA/JPL-Caltech) and
NGC 6872 (in a photo from NASA/ESA Hubble Space Telescope’s Wide Field Planetary Camera 2 (WFPC2)).
I think that a companion galaxy can help "wind up" the spiral structure of a spiral galaxy. The
Whirlpool galaxy is the classic example.
Ann
I'm so glad to see this galaxy as an APOD, and I'm so glad to see Adam Block get an APOD for one of his galaxy pictures! :D :jumping up and down:
NGC 289 is a very, very pretty spiral galaxy. The inner parts of it are very spiral-y and regular and also quite yellow, though with a healthy sprinkling of pink emission nebulas in the arms. The outer arms are blue, relatively faint, and rather irregular.
It is interesting that NGC 289 is interacting with a small companion. Other notable spiral galaxies are also interacting with dwarf satellites, such as [url=http://2.bp.blogspot.com/_O4PjV3GE83s/TE550K494yI/AAAAAAAAAOw/-GZMIkWGg6k/s400/spitzer.jpg]NGC 1512[/url] (seen in the link in a photo from NASA/JPL-Caltech) and [url=https://i.pinimg.com/originals/28/23/95/282395c0d115045d262d0e0255646cf9.jpg]NGC 6872[/url] (in a photo from NASA/ESA Hubble Space Telescope’s Wide Field Planetary Camera 2 (WFPC2)).
I think that a companion galaxy can help "wind up" the spiral structure of a spiral galaxy. The [url=https://cdn.zmescience.com/wp-content/uploads/2016/01/SPoW_Jan5_02-1024x640-1024x640.jpg]Whirlpool galaxy[/url] is the classic example.
Ann