Are galaxies part of constellations?

  • Context: High School 
  • Thread starter Thread starter wutronic
  • Start date Start date
  • Tags Tags
    galaxies space
Click For Summary

Discussion Overview

The discussion revolves around the relationship between galaxies and constellations, particularly whether galaxies are considered part of constellations or merely located within their boundaries. Participants explore visibility of galaxies from Earth, including which can be seen with the naked eye versus those requiring telescopes.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants note that galaxies are visible all over the sky, with only a few being easily visible to the naked eye, such as the Milky Way, Andromeda, and the Magellanic Clouds.
  • There is a distinction made between galaxies being part of a constellation versus being located within its boundaries, with some arguing that constellations are regions of the sky.
  • One participant questions the visibility of the Large and Small Magellanic Clouds, suggesting they may not be visible to the naked eye, while others assert they are easily visible.
  • Historical context is provided, mentioning that many constellations were named before the invention of telescopes, leading to questions about how galaxies appeared to early astronomers.
  • There is a debate regarding the classification of the Canis Major Dwarf Galaxy, with some participants expressing uncertainty about its status as a galaxy.

Areas of Agreement / Disagreement

Participants express differing views on the visibility of certain galaxies and the definition of constellations, indicating that multiple competing views remain and the discussion is unresolved.

Contextual Notes

Some claims about visibility depend on the observer's location and conditions, and there are unresolved definitions regarding what constitutes a galaxy versus a nebula.

wutronic
Messages
3
Reaction score
1
reading up on the local group and in the wiki it says galaxies have constellations: https://en.wikipedia.org/wiki/Local_Group

does this mean they are just in that area, or they are visible from Earth as part of the constellation? I thought Andromida and possibly only Canis major dwarf were visible from earth?
 
Astronomy news on Phys.org
Welcome to PF;
Technically, all the galaxies we know about are visible to us.

There are a number of galaxies visible to the naked eye ... here is a list:
https://en.wikipedia.org/wiki/List_of_galaxies#Naked-eye_galaxies

Other galaxies are visible using telescopes of one kind or another.

On the page you link to, the entry headed "constellation" refers to the constellation that the galaxy appears in.
It's a handy note to help astronomers find it. For instance, the center of the Milky Way is in the direction of the constellation of Sagittarius.

Note: technically a constellation is a region of the sky ... so galaxies are not part of the constellation but they can be found within it's boundaries.
http://www.iau.org/public/themes/constellations/
 
hi there
welcome to PF :smile:
wutronic said:
reading up on the local group and in the wiki it says galaxies have constellations: https://en.wikipedia.org/wiki/Local_Group

I didn't see that written anywhere in that link

do you know what a constellation is ?
when you discover that using google, you will then know the answer to your question

wutronic said:
does this mean they are just in that area, or they are visible from Earth as part of the constellation?

now you are changing tact and getting to the real meaning
I still want you to google what is a constellation

Galaxies are visible all over the sky, some are bright and easily seen in a small telescope
lots are very faint and require a larger scope to see them
100's of millions of them are extremely faint and require the biggest telescopes to see them

There are only 4 galaxies easily visible with the naked eye ... our Milky Way galaxy, the LMC and SMC ( satellite galaxies to the Milky Way)
and the Andromeda Galaxy

There seems to be a lot of argument over if the so called Canis Major Dwarf Galaxy is really a galaxy

Dave
 
davenn said:
hi there
welcome to PF :smile:

I didn't see that written anywhere in that link

do you know what a constellation is ?
when you discover that using google, you will then know the answer to your question
now you are changing tact and getting to the real meaning
I still want you to google what is a constellation

Galaxies are visible all over the sky, some are bright and easily seen in a small telescope
lots are very faint and require a larger scope to see them
100's of millions of them are extremely faint and require the biggest telescopes to see them

There are only 4 galaxies easily visible with the naked eye ... our Milky Way galaxy, the LMC and SMC ( satellite galaxies to the Milky Way)
and the Andromeda Galaxy

There seems to be a lot of argument over if the so called Canis Major Dwarf Galaxy is really a galaxy

Dave

Thanks for the reply :) Yeah I have, and I read all about it. However, a lot of constellations were named and observed long before telescopes so I wasn't sure if some galaxies appeared as blobs or what looked like stars. Also, I am not sure that LMC and SMC are visible by naked eye after reading about it, seems only parts of our Milky Way and andromeda are visible, no?
 
Simon Bridge said:
Welcome to PF;
Technically, all the galaxies we know about are visible to us.

There are a number of galaxies visible to the naked eye ... here is a list:
https://en.wikipedia.org/wiki/List_of_galaxies#Naked-eye_galaxies

Other galaxies are visible using telescopes of one kind or another.

On the page you link to, the entry headed "constellation" refers to the constellation that the galaxy appears in.
It's a handy note to help astronomers find it. For instance, the center of the Milky Way is in the direction of the constellation of Sagittarius.

Note: technically a constellation is a region of the sky ... so galaxies are not part of the constellation but they can be found within it's boundaries.
http://www.iau.org/public/themes/constellations/

ah, this makes sense. Thanks!
 
  • Like
Likes   Reactions: Simon Bridge
wutronic said:
...a lot of constellations were named and observed long before telescopes so I wasn't sure if some galaxies appeared as blobs or what looked like stars.
The Andromeda Galaxy used to be called "The Great Andromeda Nebula".

Note:
"Andromeda" is the constellation (or the daughter of Cepheus and Cassiopeia.). You can usually tell which is meant by context, but you should be aware of the distinction.
 
wutronic said:
Also, I am not sure that LMC and SMC are visible by naked eye after reading about it, seems only parts of our Milky Way and andromeda are visible, no?

incorrect ... the large and small clouds of Magellan are very easily visible with naked eye :smile:

Dave
 
  • Like
Likes   Reactions: Simon Bridge
davenn said:
incorrect ... the large and small clouds of Magellan are very easily visible with naked eye :smile:

Dave
At least, that's how they appeared to Magellan, but these were visible to the Polynesians and others (including Magellan) long before the invention of the telescope.

https://en.wikipedia.org/wiki/Magellanic_Clouds
 
  • Like
Likes   Reactions: davenn

Similar threads

  • · Replies 21 ·
Replies
21
Views
6K
  • · Replies 0 ·
Replies
0
Views
3K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 26 ·
Replies
26
Views
6K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 40 ·
2
Replies
40
Views
7K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K