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Alan Dyer @amazingskyguy.bsky.social · 4h

This is Comet Lemmon (aka C/2025 A6) in the moonlit evening sky on October 10, over the northern horizon, and the lights of a farm. The waning gibbous Moon was rising in the east off camera, lighting the sky and landscape.

Details in Alt Text.

The comet was brightening and rising higher into the northern evening sky at this time, October 10, 2025. The comet was just visible in 50mm binoculars as a fuzzy star. A short tail is visible in the photo, with the aid of contrast enhancement!

The comet was in Ursa Major below the Big Dipper. Taken from home in southern Alberta. The field is 10º by 15º.

Technical:
This is a blend of a stack of:
- 4 x 15-second exposures untracked for the ground,
- 4 x 15-second exposures tracked for the sky,
- with the Canon RF135mm lens at f/2.8 and on the Canon R5 at ISO 1000, and on the Star Adventurer 2i tracker.

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Dave Mason @davemason.bsky.social · 3h

Tonight's Thanksgiving Weekend Moon from the balcony.

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Scott Kardel aka Palomar Skies @palomarskies.bsky.social · 14h

🔭 1/2 Here's the Tulip Nebula (Sharpless 101) a glowing cloud of hydrogen gas located about 6,000 light years away in the direction of the constellation of Cygnus, the Swan. The nebula is nice but what makes me happiest is what is also in this image.

A telescopic image of a dense field of stars. At center in the Tulip Nebula, a red cloud of glowing gas with an irregular shape. Two dark "fingers" of dust can be seen extending up from the bottom part of the nebula.

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RASC Calgary Centre @calgaryrasc.bsky.social · 1d

Some closeup details along the lunar terminator. #Moon #Astronomy

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RASC Calgary Centre @calgaryrasc.bsky.social · 1d

Tonight’s waning gibbous #Moon. #astronomy

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RASC Calgary Centre @calgaryrasc.bsky.social · 1d

I currently have two missing, hoping that they come back.

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Chris Nagano @charliesaito22.bsky.social · 1d

Scientists amazed to discover a bat species that specializes in hunting songbirds migrating at high altitudes

www.science.org/doi/pdf/10.1...

Greater noctule bats prey on and consume passerines in flight

Despite billions of passerines seasonally migrating during the night at high altitudes, only three bat species have been found to consistently tap into this rich prey resource. However, it remains unk...

www.science.org

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Kyle Horton @kyle-horton.bsky.social · 3d

Another massive movement of migratory birds underway tonight — nearly 1 Billion Birds! With the full moon, you might be able to see some silhouettes zipping by. You can make your own flow maps here (just hit record): aeroecolab.com/uslights

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RASC Calgary Centre @calgaryrasc.bsky.social · 1d

Some closeup details along the lunar terminator. #Moon #Astronomy

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RASC Calgary Centre @calgaryrasc.bsky.social · 1d

Tonight’s waning gibbous #Moon. #astronomy

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RASC Calgary Centre @calgaryrasc.bsky.social · 1d

On Wednesday, I presented a talk about light pollution and Canadian species at risk to a bunch of biologists at the annual conference of the #Wildlife Society

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Jason Nishiyama @evilscientistca.bsky.social · 1d

M20, The Trifid Nebula, is an HII region located about 4100 ly away in the constellation of Saggitarius.

An HII region is a cloud of gas and dust with large amounts of ionized hydrogen gas. Stars are often formed in regions like this.

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RASC Calgary Centre @calgaryrasc.bsky.social · 1d

Golden hour, #Calgary, looking west.

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RASC Calgary Centre @calgaryrasc.bsky.social · 1d

Golden hour, #Calgary.

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RASC Calgary Centre @calgaryrasc.bsky.social · 1d

Very nice!

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Alex @alexinmancs.bsky.social · 1d

A bit of amateur crater spotting from England.

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SkyCalPro | Kev @skycalpro.com · 1d

Quick break. Halfway

SkyCalPro | Kev @skycalpro.com · 2d

I don't often ask for help but here's something you can do for me today:
Hit 🔁 if you like my pics 😁
Hit 🩷 if you like skycalpro.com (it's free!)

Want to support my walk today for an awesome cause?

Click my just giving and pop in a couple of quid!

shorturl.at/ERzXw##

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RASC Calgary Centre @calgaryrasc.bsky.social · 2d

We’re two days past #FullMoon and the terminator is highlighting a set of three similar-sized craters. The most prominent one is Langrenus, with Vendelinus and Petavius to its south. #astronomy

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RASC Calgary Centre @calgaryrasc.bsky.social · 2d

Large flocks of migratory #birds moving through the Fox Valley region of Saskatchewan Wednesday. #skstorm

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RASC Calgary Centre @calgaryrasc.bsky.social · 2d

You should sign up to post on the astronomy channel hashtag if you haven’t already. It’s a bit of a process but it’s worth it. Here’s how to do it; that bot.astronomy.blue is the one you need to interact with: bsky.app/profile/astr...

bot.astronomy.blue