timmdeeg's latest activity

Clear nights have been scarce lately, but tonight I was able to image Jupiter and the Galilean moons: This is a 200% crop from a...

https://arxiv.org/pdf/2412.15143 We compare the standard homogeneous cosmological model, i.e., spatially flat ΛCDM, and the timescape...

That's just natural, nothing paradox or unexpected.

You could say the same about any measurement unit. We rely on past calibrations and our graphs etc. to give the distance from a given...

If we talk about cosmological distances, aren't these spacelike? So, we would need the knowledge of the expansion history to know them...

What exactly is the difference between the wave function being an object and being ontic in case it is ontic according to a certain...

Whether or not the wave function real is in the sense of ontic is interpretation dependent.

No. Yes, we do. "Infalling mass" is a specific region of spacetime, occupied by nonzero stress-energy. A portion of that region is...

Isn't this in contradiction to ? We don't distinguish infalling mass from mass of the black hole.* So, either the "mass" of the hole...

Is this true regarding infalling mass too? If stress-energy of infalling mass doesn't disappear then how would this fit with...

Artemis II has now launched and is on the way to the Moon: NASA's Artemis II Moon Mission Lifts Off By pure coincidence I shot the...

Took this a few weeks ago, forgot to share. I've forgotten the camera settings (400mm @f/4 lens, tho...): Jupiter (visible as a tiny...

Had a few clear nights during the past week, here's M44 (Beehive cluster/Praesepe): Definitely happy with the outcome, especially the...

Just to add a forth point, that's because we will never be able to to measure spacial flatness zero in the strict euclidean sense.

Jupiter 2026-02-14 06:41.4 UT. After several weeks and many nights of bad seeing, clouds, terabytes of wasted data, and whatnot, I...