Astronomy Weekly Newsletter

Astronomy newsletter

Top new questions this week:

How much competition there is for jobs in astronomy compared to other fields of science?

I will soon finish a master's degree in computer science. I have been interested in astronomy for some time, which has included playing around with a Newtonian reflector telescope and reading about ...

telescope astrobiology  
asked by mmh 5 votes
answered by J. O'Brien Antognini 2 votes

Stellar mass limits for Neutron Star and Black Holes

Don't hate on me if I am asking a very basic and straightforward thing. I have a few questions about black holes and neutron stars. What is the mass range (in terms of solar masses) for a main ...

black-hole supernova stellar-evolution mass neutron-star  
asked by Youstay Igo 3 votes
answered by HDE 226868 7 votes

What does the Sun's orbit within the Solar System look like?

Everything in the Solar System revolves around the "barycenter": the overall center of mass. This barycenter is not in the center of the Sun. Some articles and essays I've read go so far as to suggest ...

asked by Ricky 3 votes
answered by Rob Jeffries 7 votes

Why does Titan have lower surface gravity than the Moon when Titan is more massive?

Reading on Wikipedia I saw that Titan is 80% more massive than the earth's moon but has only 85% the surface gravity. Why is this?

gravity titan  
asked by Ceribia 3 votes
answered by rob 10 votes

How big will Apophis appear?

How big will Apophis appear in the sky at its closest point of approach in 2029? Will it compare to the moon? How long will it linger as it passes?

observation amateur-observing asteroids  
asked by Anthony McCloskey 3 votes
answered by Mike G 3 votes

Pinhole projector for the Transit of Mercury

Very quick and simple one today. What would be the best/optimal pinhole size for a pinhole projector to observe the transit of Mercury on May 9th? I want to get the optimum between resolution and ...

observation amateur-observing mercury planetary-transits  
asked by MichaelJRoberts 3 votes
answered by uhoh 5 votes

Are larger stars rounder?

The Earth is a very smooth sphere, and the Sun even more so, with only minor fluctuations. I am wondering: are larger stars even rounder? Intuitively, that seems self evident, but I am not so sure. ...

star hydrostatic-equilibrium stellar-structure  
asked by Hohmannfan 2 votes
answered by HDE 226868 1 vote

Greatest hits from previous weeks:

9th planet location?

I've seen a number of news reports indicating there is likely a 9th planet in our Solar System, something with an orbital period of between 10k-20k years, that is 10 times Earth's mass. I haven't seen ...

solar-system planets 9th-planet  
asked by PearsonArtPhoto 34 votes
answered by Dan Neely 29 votes

How bright would the sun appear from the hypothetical Planet Nine proposed by Caltech?

Theoretical Planet Nine, proposed by Caltech's Mike Brown and Konstantin Batygin, is said to have a 15-20 thousand year orbit. Approximately how bright would the sun appear from Planet Nine aphelion ...

sun planets 9th-planet  
asked by joseph.hainline 15 votes
answered by j-g-faustus 20 votes

Can you answer this?

Plot an AltAz grid over a square grid of RADec points

first post here. As I'm new, StackExchange won't let create or use the wcsaxes tag. wcsaxes looks like the most appropriate tool for the job, but astropy is closely related. I think the title says ...

python astropy  
asked by Christopher Jordan 1 vote
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