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🗺️⛈️Alexander⛈️🗺️

@naturallyadisaster.bsky.social

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Reposted by 🗺️⛈️Alexander⛈️🗺️

Hourly Cosmos

@hourlycosmos.bsky.social

NGC 1365 and Supernova SN2012fr - From Rolf Wahl Olsen - https://flic.kr/p/dsnfg9

This image shows the large elegant barred spiral galaxy NGC 1365, located in the southern constellation of Fornax at a distance of 56 million light years.
The bright and intensely blue star directly below the galaxy core is supernova SN2012fr, which was discovered by Alain Klotz (TAROT La Silla telescope) on 27th October 2012.

As of 10th November 2012 the supernova appeared to be nearing its peak, with an R magnitude of 11.90. To get an idea of how bright this event is we can calculate the absolute magnitude M of the supernova using the following formula where m is the apparent magnitude and D the distance in parsecs:

M = m - 5(log10(D) - 1)

This gives an absolute magnitude of -19.27 for SN2012fr. This means that if the supernova had occurred at a distance to us similar to Betelgeuse (643 light years), then its apparent magnitude would be -12.80, same as the full Moon!

Image details:
Date: 7th and 9th November 2012
Exposure: LRGB: 205:57:56:51m, total 6hrs 9mins @ -30C
Telescope: 10" Serrurier Truss Newtonian f/5
Camera: QSI 683wsg with Lodestar guider
Filters: Astrodon LRGB E-Series Gen 2
Taken from my observatory in Auckland, New Zealand

April 30, 2025 at 1:00 AM

Reposted by 🗺️⛈️Alexander⛈️🗺️

Dr. Robin Tanamachi 🌪️

@tornatrix.bsky.social

Please read the last AFD from John Gordon of NWS Louisville, containing numerous pearls of wisdom. I wish him a long and healthy retirement, despite the circumstances.
forecast.weather.gov/product.php?...

National Weather Service

forecast.weather.gov

February 28, 2025 at 3:16 PM

Reposted by 🗺️⛈️Alexander⛈️🗺️

Wolf Conservation Center 🐺

@nywolforg.bsky.social

Among the countless federal workers that could be (+ are) impacted by the hiring freezes are Dept. of Interior, National Park Service, + USFWS employees. These new orders will leave parks + species recovery teams understaffed, thus impacting the very animals we're working to save.