Search found 135 matches
- Wed Oct 18, 2017 9:48 pm
- Forum: Galileo's Gabfest
- Topic: Observing Challenge: Variable Star R Aquarii
- Replies: 3
- Views: 3207
Re: Observing Challenge: Variable Star R Aquarii
Paul: Yes! To quote from the AAVSO visual observing manual: "Another technique that is strongly recommended for making magnitude estimates of red stars is called the “out-of-focus method.” That is, the eyepiece must be drawn out of focus so far that the stars become visible as colorless disks. ...
- Wed Oct 11, 2017 7:58 pm
- Forum: Galileo's Gabfest
- Topic: Observing Challenge: Variable Star R Aquarii
- Replies: 3
- Views: 3207
Observing Challenge: Variable Star R Aquarii
There's a pretty cool variable star that needs visual observations: R Aqr (Aquarius). This star is actually a binary pair, separated by about the distance between Saturn and our sun. The two stars started life with somewhat different masses. The more massive one (now called star "B"), reac...
- Mon Feb 27, 2017 9:40 pm
- Forum: Galileo's Gabfest
- Topic: Pluto chapter III
- Replies: 21
- Views: 9400
Re: Pluto chapter III
..Pluto's odd orbit. I'm sure there are many theories of how this came to be. Can any of you mention some of them??? Jerry - Thanks for your comments. I'm finding this conversation kind of fun. (The one course in college that I received the lowest final grade on was Dynamical Astrophysics: the stud...
- Sat Feb 25, 2017 1:00 pm
- Forum: Galileo's Gabfest
- Topic: Pluto chapter III
- Replies: 21
- Views: 9400
Re: Pluto chapter III
Wikipedia has some interesting information on the stability of the solar system, including Pluto and Neptune, which are currently locked in an orbital resonance that prevents collisions for some time into the future (10-20 million years). Beyond that, we can't predict. By the way, one of the things...
- Mon Feb 06, 2017 8:38 pm
- Forum: The Imager's Studio
- Topic: NGC 253, the Sculptor Galaxy
- Replies: 8
- Views: 3569
Re: NGC 253, the Sculptor Galaxy
Beautiful, Andy.
As I look across your images, it looks like the diffraction spikes aren't always at the same angle relative to the CCD. Are you able to rotate the camera remotely? Or is that something that requires hands-on adjustment?
- Mark Munkacsy
As I look across your images, it looks like the diffraction spikes aren't always at the same angle relative to the CCD. Are you able to rotate the camera remotely? Or is that something that requires hands-on adjustment?
- Mark Munkacsy