Size of horsehead nebula

  • Thread starter Maria76
  • Start date
  • Tags
    Nebula
  • #1
14
0
Hi,

I was looking at information about the Horsehead nebula on wikipedia
http://en.wikipedia.org/wiki/Horsehead_nebula

and it says that its apparent dimensions are 8x6 arcmins.

I'm not sure how to find the actual dimensions, say in light-years. Here's how I believe it should be, but I'm sure I'm wrong.

According to wikipedia, the nebula is 1500 ly away. 1 arcmin = 1/60 degrees. So the dimensions should be:

1500*tan(8/60) by 1500*tan(6/60), which is 3.5 ly by 2.6 ly.

Have I got it right, or have I missed something obvious.

Thanks,
Maria
 
Astronomy news on Phys.org
  • #2
Maria76 said:
1500*tan(8/60) by 1500*tan(6/60), which is 3.5 ly by 2.6 ly.

Confirmed.
 

Suggested for: Size of horsehead nebula

Back
Top