Astronomy Weekly Newsletter

Astronomy newsletter

Top new questions this week:

What is star composition after formation

Most descriptions of star ignition go something like... The star reaches a critical mass and ignites, blowing away the surrounding material. The most obvious question would be "Why are stars not all …

star star-formation  
asked by PhilC 2 votes
answered by Warrick 0 votes

How is space-time bent by black holes?

I just read When a star becomes a black hole, does its gravitational power become stronger? and it confused me a bit; I always thought black holes are supermassive and that is why they bend …

black-hole space-time  
asked by Ryokel 2 votes
answered by Yashbhatt 1 vote

The face of the moon at moonset

It appears that the face of the moon "rotates" clockwise from the time the moon rises to the time it sets. Tycho's crater seems more to the left and the "Rabbits head" looks like it's facing down …

asked by Itumac 1 vote
answered by Jeremy 3 votes

Telescope on polluted environment

this one bothering me,to buy a telescope. I live in a city,unfortunately with dust and polluted air, is there any affect in viewing a nice capture of our galaxy? Or i need to buy a special telescope?

asked by bumbumpaw 1 vote
answered by user3814836 2 votes

Can we conclude with reasonable certainty that there is/are no Type 3 Civilizations in our galaxy?

As per the Kardashev Scale, type-3 civilizations are defined as "civilization(s) in possession of energy on the scale of its own galaxy, with energy consumption at ~ 4 x 10^44 erg/sec". Considering …

asked by pat_nafs 1 vote
answered by HDE 226868 0 votes

Beta profile fit of Virgo cluster gas?

I'm looking for the parameters $r_c$, $\rho_0$ and $\beta$ in a $\beta$-profile fit of the Virgo cluster's ICM density. I just can't find a reference for it. Unlike for Coma (Abell 1656) where it's in …

cosmology gas  
asked by con-f-use 1 vote
answered by Aaron 2 votes

Greatest hits from previous weeks:

Does the Sun belong to a constellation?

Each new star we find is generally considered to be part of the constellation it is nearest to. Our Sun is obviously a star, just much closer. Is our Sun part of any constellation? If so, which …

sun constelations  
asked by RhysW 11 votes
answered by Jon Ericson 16 votes

What is the maximum number of planets in the habitable zone?

At present, it seems like we are alone in our solar system. How many earth-like planets would fit into the habitable zone of the solar system? The orbits should be stable for quite a time, i.e. for …

solar-system exoplanet earth-like-planet habitation-zone  
asked by draks ... 6 votes
answered by Suyog 2 votes
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