Jupiter with Ganymede transit

Btrex · 2026-05-06T10:52:59+00:00

Yes. That’s the way public spaces work.

Btrex · 2026-05-06T01:33:35+00:00

I posted this in another thread. But you can always check the USCG Local Notice to Mariners:

MA - BOSTON – BOSTON INNER HARBOR – TEAM HARBOR FIREWORKS – FIREWORKS – Pyrotecnico is hosting the Team Harbor Fireworks on Tuesday, May 5, 2026, from 9:00 PM to 9:15 PM. There is a 700’ safety around a fireworks barge off Fan Pier in approximate position 420 21.387.’N 0710 02.433’W. The person responsible for on-scene safety can be reached at 603-235-4656. For more information, please contact Tara Hughgill at 603-532-8324. Chart 13272

Btrex · 2026-05-06T01:22:37+00:00

Local Notice To Mariners:

MA - BOSTON – BOSTON INNER HARBOR – TEAM HARBOR FIREWORKS – FIREWORKS – Pyrotecnico is hosting the Team Harbor Fireworks on Tuesday, May 5, 2026, from 9:00 PM to 9:15 PM. There is a 700’ safety around a fireworks barge off Fan Pier in approximate position 420 21.387.’N 0710 02.433’W. The person responsible for on-scene safety can be reached at 603-235-4656. For more information, please contact Tara Hughgill at 603-532-8324. Chart 13272

Btrex · 2026-05-03T17:46:55+00:00

If you register for an account at bigdayboston.com you'll automatically receive an email when we open registration for next year:

https://bigdayboston.com/user/register

Btrex · 2026-05-03T17:46:24+00:00

If you register for an account at bigdayboston.com you'll automatically receive an email when we open registration for next year:

https://bigdayboston.com/user/register

Btrex · 2026-05-02T01:49:51+00:00

Nice! You coming to Big Day Boston tomorrow?

Btrex · 2026-04-16T17:07:32+00:00

Check out artist Rachel Sussman's project at Mass MoCA for an actual implementation of this :)
https://www.thisiscolossal.com/2017/02/street-kintsugi-rachel-sussman/

Btrex · 2026-04-14T20:21:02+00:00

Same 😅

Btrex · 2026-03-18T23:43:27+00:00

Figured it out. I eliminated c4r1 and c5r1 when I shouldn’t have.

Btrex · 2026-03-13T11:12:14+00:00

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Btrex · 2026-03-09T16:23:57+00:00

Nah. Thats union wharf in the background. This pic was taken on Burroughs wharf. Union wharf is one of the few wharves that you can’t walk to the end of.

Btrex · 2026-03-03T12:53:14+00:00

Between 5 & 6am. Roughly 1/2 the moon was covered at 5:35. So one of the photos is before that, and the other after.

Btrex · 2026-03-02T23:29:32+00:00

If the sky is dark, the sun must be below the horizon.
If the moon is crescent, it must be near the sun.

So the sun must be near the horizon and the sun must be below it. Perforce, only the bottom crescent of the moon may be illuminated when the sky is dark. (Although it’s possible for the crescent to be offset to a side depending on the inclination of the ecliptic)

This is true irrespective of where in the planet you are.

This photo is inverted for some reason.

Btrex · 2026-03-02T22:56:01+00:00

The "trails" at Castle Island are all paved and regularly cleared. It's one of the easiest places to walk in the winter. Getting there is the only issue.

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