A Random Thread For Astronomical Stuff.

[hellymedic]

D's eclipse shot got contrailed too…

[Mr Larrington]

aLiEnS!,,,,! cHeMtRaIlS!!

[Jurek]

What I'm trying to get my head around is that the image on my screen shows the 'bite' to have been taken out of the sun in the bottom right quarter. Everyone else's shows the bite in top left - I understand this is because my device is effectively a pin-hole camera, which inverts the image. Everyone else's image is from a conventional camera. How come Wowbagger's  image shows the flare of the sun with the bite taken out of the bottom right quarter?

[Vernon]

What I'm trying to get my head around is that the image on my screen shows the 'bite' to have been taken out of the sun in the bottom right quarter. Everyone else's shows the bite in top left - I understand this is because my device is effectively a pin-hole camera, which inverts the image. Everyone else's image is from a conventional camera. How come Wowbagger's  image shows the flare of the sun with the bite taken out of the bottom right quarter?

The Sun image you can see in Wow's photo is a reflection rather than the Sun. The Sun itself is saturating the sensor in the white section above the crescent image, and the fraction of a percent of light reflected off the lens or sensor chip is  bright enough to cause this reversed image. It's a similar cause a a double rainbow, due to a secondary reflection.

[Jaded]

Also, the smaller images are of a sun a lot further away.

[T42]

D's eclipse shot got contrailed too…

Much better lens than mine & bigger image at focal plane.

[Peter]

"Hip, Hip, Hip, Hip, Hooray!"

[Wowbagger]

What I'm trying to get my head around is that the image on my screen shows the 'bite' to have been taken out of the sun in the bottom right quarter. Everyone else's shows the bite in top left - I understand this is because my device is effectively a pin-hole camera, which inverts the image. Everyone else's image is from a conventional camera. How come Wowbagger's  image shows the flare of the sun with the bite taken out of the bottom right quarter?

It has been suggested that the odd artefact in my photo might not be of the sun at all, but coincidentally is the same shape. I've no idea what a phone camera does to images.

I used to sleep in a pinhole camera. My bedroom, in my second year at college, had curtains which didn't quite meet at the top. On bright sunny mornings, an inverted image of the houses opposite appeared on the wall above my bed.

[Jurek]

What I'm trying to get my head around is that the image on my screen shows the 'bite' to have been taken out of the sun in the bottom right quarter. Everyone else's shows the bite in top left - I understand this is because my device is effectively a pin-hole camera, which inverts the image. Everyone else's image is from a conventional camera. How come Wowbagger's  image shows the flare of the sun with the bite taken out of the bottom right quarter?

It has been suggested that the odd artefact in my photo might not be of the sun at all, but coincidentally is the same shape. I've no idea what a phone camera does to images.

I used to sleep in a pinhole camera. My bedroom, in my second year at college, had curtains which didn't quite meet at the top. On bright sunny mornings, an inverted image of the houses opposite appeared on the wall above my bed.

My bold.
I have exactly the same in my bedroom - but only during BST.

[hellymedic]

D's eclipse shot got contrailed too…

Much better lens than mine & bigger image at focal plane.

Well, it WAS a camera body stuck onto a small telescope...

[T42]

D's eclipse shot got contrailed too…

Much better lens than mine & bigger image at focal plane.

Well, it WAS a camera body stuck onto a small telescope...

Yeah, straight-through refractor, I noticed. My best scope for optical quality is an ETX 90 with a powered altaz mount but prime focus adaptors foul the mount at az > 20° or so. Kinda limited.

[Kim]

I used to sleep in a pinhole camera. My bedroom, in my second year at college, had curtains which didn't quite meet at the top. On bright sunny mornings, an inverted image of the houses opposite appeared on the wall above my bed.

My bold.
I have exactly the same in my bedroom - but only during BST.

When we lived in the People's Republic we used to be able to watch our neighbour loading and unloading his van on our bedroom ceiling.

[T42]

Got the ETX 90 again last night but got a motor unit failure message on the control paddle when it tried to slew. I bought it in the 90's and haven't used it for years so I suppose it can be forgiven.  Not really much point in trying to get it fixed with the light pollution around here: the phyzzy/dentistry joint next door has security lights on a motion sensor and the bloke across the road has the same, and his illuminate our garden every time a car goes by.

[Peter]

Bigging up Wales's dark skies by the BBC:-

https://www.bbc.co.uk/news/uk-wales-64756972

Also stunningly visible (much better than those pics) in Rochdale, Greater Manchester, home of permanent daylight.  Thank God the BBC didn't trail this, or it would have clouded over!

[Basil]

Ah, right.
I wondered why it keeps getting dark

Seems Wales has night as well. 

[Peter]

But only if the BBC has a reporter there!

[T42]

Sloppy article about 2023 DZ2:  https://www.theguardian.com/science/2023/mar/24/city-killer-asteroid-to-pass-harmlessly-between-earth-and-moon

More to the point, it's only going to miss Earth by 19 hours.

https://en.wikipedia.org/wiki/2023_DZ2

[a] If 2023 DZ2 had been arriving approximately 19 hours later it would have impacted into Earth as that is where the two orbits intersect.

[Basil]

Perseids.
Total cloud cover.
Again.

As you were.

 

[Jaded]

Here too. Bah!

[Mr Larrington]

Sloppy article about 2023 DZ2:  https://www.theguardian.com/science/2023/mar/24/city-killer-asteroid-to-pass-harmlessly-between-earth-and-moon

More to the point, it's only going to miss Earth by 19 hours.

https://en.wikipedia.org/wiki/2023_DZ2

[a] If 2023 DZ2 had been arriving approximately 19 hours later it would have impacted into Earth as that is where the two orbits intersect.

You've just reminded of the utterly bonkers size comparisons that the Jerusalem Post coughs up every time a near-Earth object hoves into view.  This one was said to be the size of “22 tuna fish”; others include:

• 2023 JK = 18 walruses
• 2023 OR1 = 100 Barbie dolls, and
• 2023 NY = 35 chickens

[T42]

Reminiscent of Rabbi Blue and his parable about goats, chickens etc.  "Get some walruses".


Perseids: high haze here w. the odd darker cloud.

[Peter]

Perseids: high haze here w. the odd darker cloud.

Hi Haze, no silver lining here in Mancunia, too.

[Mr Larrington]

Perseids: high haze here w. the odd darker cloud.

Hi Haze, no silver lining here in Mancunia, too.

[“Get out!” – Ed.]

[spesh]

Perseids.
Total cloud cover.
Again.

As you were.

 

ObligOatmeal: https://s3.amazonaws.com/theoatmeal-img/comics/celestial_events/celestial_events.png 

[Basil]