Green Blob in the Sky

Green Blob in the Sky

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Discussion

Boring_Chris

Original Poster:

2,348 posts

122 months

Friday 13th January 2017
quotequote all
As a clueless enthusiast of all things spacey, I was photo'ing a red star just now when I happened over a little green blob that wasn't visible to the naked eye.

I cant for the life of me think what the green stuff is?

Anyone shed any light?


V8FGO

1,644 posts

205 months

Friday 13th January 2017
quotequote all
Sure they are stars as both appear as discs.
Pretty sure you have got Mars (red), and the greenish blob would be Neptune.

http://www.space.com/16149-night-sky.html

Boring_Chris

Original Poster:

2,348 posts

122 months

Friday 13th January 2017
quotequote all
DELETED: Comment made by a member who's account has been deleted.
Good call, but Venus is way over the other side of Earth!

Boring_Chris

Original Poster:

2,348 posts

122 months

Friday 13th January 2017
quotequote all
V8FGO said:
Sure they are stars as both appear as discs.
Pretty sure you have got Mars (red), and the greenish blob would be Neptune.

http://www.space.com/16149-night-sky.html
Again, sorry, Neptune is on the other side of Earth.

This was East, just to the left of the Moon.

I think in the Leo constellation?

Beati Dogu

8,892 posts

139 months

Friday 13th January 2017
quotequote all
Probably lens flare or reflection off one of the camera's lenses.

Simpo Two

85,422 posts

265 months

Saturday 14th January 2017
quotequote all
V8FGO said:
Sure they are stars as both appear as discs.
I think you meant that as a question not a statement...

Moonhawk

10,730 posts

219 months

Sunday 15th January 2017
quotequote all
Beati Dogu said:
Probably lens flare or reflection off one of the camera's lenses.
Yep - this.

Moonhawk

10,730 posts

219 months

Sunday 15th January 2017
quotequote all
V8FGO said:
Sure they are stars as both appear as discs.
All stars appear so - mainly due to defects in optics, inaccurate focus etc.

Even with perfect optics and perfect focus - stars would still appear as disks due to the diffraction limit:

https://en.wikipedia.org/wiki/Airy_disk