Linked Questions

13 votes
2 answers
5k views

What is that donut-shaped object I see in my telescope? [duplicate]

I was looking through my telescope for the first time and came across this weird star. I think its a celestial donut but im not sure.
Mani S's user avatar
  • 149
7 votes
2 answers
2k views

Jupiter with a mobile phone and Celestron Astro FI 102mm Maksutov

My name is John, I am new here and now that I am retired I decided to get myself my first ever telescope, why I never got one before I have no idea...probably too busy. So I thought I would try and ...
John Lumb's user avatar
6 votes
3 answers
2k views

Trouble Seeing Distant Planets Such as Jupiter and Uranus

I am a beginner and I am using a Celestron AstroMaster 114 telescope. Whenever I try to view distant planets such as Jupiter I am presented with a black circle that has black lines leading from it. In ...
Keegan's user avatar
  • 61
11 votes
1 answer
1k views

Did this satellite streak past the Hubble Space Telescope so close that it was out of focus? If so, how close was it?

The new Nature Astronomy paper The impact of satellite trails on Hubble Space Telescope observations (Kruk et al. 2023) describes an AI-based object classification method used to find satellite trails ...
uhoh's user avatar
  • 30.7k
7 votes
1 answer
2k views

What cluster of stars is this with a "dark donut" to one side?

In the 2011 Sixty Symbols video Spy Satellites (from Deep Sky Videos) after about 01:44 amateur astrophotographer Nik Szymanek shows an image of a cluster of stars ...
uhoh's user avatar
  • 30.7k
5 votes
2 answers
814 views

A smudge near Jupiter

I was looking at the Jupiter for the first time today and I have noticed a smudge near it. Could someone explain what it is, please? I was looking online but did not find anything. So I thought that ...
bakua's user avatar
  • 151
7 votes
2 answers
466 views

Venus' magnitude during inferior conjunction

I was doing an assignment on Stellarium when I observed Venus to have an apparent magnitude that didn't become less negative than -3, even at inferior conjunctions when we faced the dark side of Venus....
Diaa Eldin Malek's user avatar
2 votes
2 answers
453 views

Did Hubble see a pair of UFOs? (Identify this artifact)

The image below is this one, found in this group of Hubble space telescope images of the interstellar comet 2I/Borisov (C/2019 Q4). Can anyone recognize this pair of artifacts in the upper right ...
uhoh's user avatar
  • 30.7k
3 votes
1 answer
525 views

Why do planets just look like a dark ball in my telescope

I bought a Matsukov Cassegrain many years ago and now wanted to dust it off and use it. I had two young kids at the time so couldn't really find the time. Last night Jupiter and Saturn were both ...
Francesca Bahr's user avatar
1 vote
1 answer
221 views

Does this CHEOPS first light image imply bad astronomy?

@KeithMcClary's comment under lousy mirror corrected by software links to Bad Astronomy's First Light for the Exoplanet Hunter Mission CHEOPS Goes Tetrahedral which shows the image below. I understand ...
uhoh's user avatar
  • 30.7k
4 votes
1 answer
129 views

Is this object Mars?

I decided to try the Astrophotography mode on my phone. Looking at the image I saw an object I didn't notice at the time. What is the blue circle right of the Moon and just on the top right of the ...
ndnenkov's user avatar
  • 143