I found an article on nasa.org titled “Hubble’s Bright Shining Lizard Star” it talks about how hubble took pictures of the universe NGC 7250. it has a lot of bright star formations but it is outshined by a star close by. The star TYC 3203-450-1, is located in the Lacerta constellation, it is much closer to us then that galaxy behind it so its brighter. this is the only way a star could outshine a whole galaxy, these stars are called foreground stars.
this article relates to Co 11 ” I can explain how astronomers study the properties of stars including; distance, size and mass” In class we learned about apparent and absolute magnitude. We measure the brightness of the star mentioned in the article by something called apparent magnitude, this is how bright something looks from our earth point of view. absolute magnitude is the objects actual brightness. we also learned about parallax angles which help us determine which star is closer,
this is a picture of binary stars, these are two stars that orbit a center of mass. binary stars still follow Kepler’s laws. since these stars are super far away its hard to tell if they are binary stars, we determine this through doppler shift.
I found this unit confusing, I also missed a day of class because I was sick which caused my set of notes to be incomplete. other than that this unit was interesting to learn about but it was also kind of boring.