Thanksclintonbob wrote:If a planetary nebula is spherical, how come we see it as cylindrical? Why doesn't the expanding gas coming directly towards us prevent us from seeing anything but a sphere of gas?
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- Thu Feb 02, 2012 3:04 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Helix Nebula from the VISTA... (2012 Jan 31)
- Replies: 26
- Views: 7861
Re: APOD: The Helix Nebula from the VISTA... (2012 Jan 31)
- Wed Feb 01, 2012 1:50 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Helix Nebula from the VISTA... (2012 Jan 31)
- Replies: 26
- Views: 7861
Re: APOD: The Helix Nebula from the VISTA... (2012 Jan 31)
If a planetary nebula is spherical, how come we see it as cylindrical? Why doesn't the expanding gas coming directly towards us prevent us from seeing anything but a sphere of gas?