sciencealert.com

outstanding_bond, 5 miesięcy temu do astronomy w NASA Selects a Wild Plan to "Swarm" Proxima Centauri With Thousands of Tiny Probes

A very cool idea, however the headline is misleading - NASA has not even remotely committed to running this mission. They’ve selected the swarm project as one of 13 projects in their innovation program and given it up to $175k to study feasibility. That’s roughly a postdoc for two years. This is far, far from committing the hundreds of millions or billions needed for the execution of this mission.

lordmauve, 3 miesiące temu do astronomy w A Mysterious Impact Left 2 Billion Craters On The Surface of Mars

Real scientists would say two gigacraters.

HootinNHollerin, 4 miesiące temu do astronomy w A Mysterious Wave-Like Structure in Our Galaxy Found to Be Slowly Slithering

Are the wobbles just from the gas cloud being pulled by gravity from everything?

Xariphon, 5 miesięcy temu do astronomy w A Bizarre State of Matter Exists Deep Inside Large Neutron Stars

Would it be a yes-or-no thing, or more of a continuum?

At stellar mass x there's Some quark soup but it's mostly ordinary neutronium, at 50x there's More, at 10,000x there's Pretty Much All Of It, etc?

Or is it a critical mass kind of thing where at stellar mass x there's No Soup For You and at x+3 it's a veritable soup buffet?

MartianSands, 5 miesięcy temu

The latter, I suspect. That’s certainly how forming a neutron star works in the first place, because if a star gets so dense that it can form neutronium then the neutronium (which is far more dense than the core was before) can easily keep making more.

It’s a similar story with black holes. Get past the threshold at which it forms, and the process runs away and swallows the whole star.

If a quark soup is more dense than neutronium, then it would be fairly all-or-nothing

5714, 4 miesiące temu do astronomy w Salads Grown in Space May Pose a Deadly Problem

It seems that space ecosystems are underdeveloped.