Astronomy Weekly Newsletter

Astronomy newsletter

Top new questions this week:

What are the cloud-like blobs in the Martian southern hemisphere?

In a very recent edition of New Scientist, an article Mystery cloud-like blobs over Mars baffle astronomers (16 Feb, 2015), detailed that on 12 March 2012, amateur astronomers around the world ...

mars atmosphere  
asked by Sabre Tooth 4 votes
answered by Py-ser 3 votes

Is the conversion from proto-star to main sequence an event or a process?

When a proto-star becomes a main sequence star, is that something that happens in an instant when a certain threshold is met, or is it a process that takes a few thousand/million years?

protostar main-sequence  
asked by Scottie 3 votes
answered by David Hammen 4 votes

Do all stars have the potential to have life supporting planets?

Regardless of how big or small, how hot or cold, do all stars have a goldilocks zone, and if so, could any given planet in this zone (with the right configuration) support life?

life star-systems  
asked by Scottie 3 votes
answered by Rob Jeffries 5 votes

What's the mass of the interstellar neighborhood of the Sun?

What's approximatively the mass of the interstellar neighborhood of the Sun ? (for example the neighborhood of radius 50 light-years). Remark: The mass of the observable matter should be completed ...

sun mass dark-matter interstellar  
asked by Sébastien Palcoux 3 votes
answered by Rob Jeffries 6 votes

How can we tell that a short-period binary is tidally locked?

Observationally, how can this be established? What is known theoretically about the process? Are there any reference papers to read?

binary-star tidal-forces  
asked by questionhang 3 votes
answered by Rob Jeffries 4 votes

Do the planets, asteroid belt, kuiper belt, and scattered disc lie on the same plane?

If not, do any of the four groups in the title lie on the same plane as other members of the group? E.g. does the asteroid belt lie on the same plane as the planets do?

asked by Kyth'Py1k 2 votes
answered by Victor 3 votes

How much light does Jupiter project onto the surface of Ganymede?

I suppose the answer would be a range as the Jupiter-facing side of Ganymede passed from Jupiter's light side to its shadow side. I'd also like to know how much light the sun projects onto the surface ...

orbit jupiter  
asked by Nate Taylor 2 votes
answered by Rob Jeffries 2 votes

Greatest hits from previous weeks:

Is the moon moving further away from Earth and closer to the Sun? Why?

According to The NASA Moon Facts page: The moon is actually moving away from earth at a rate of 1.5 inches per year. Why is the moon moving further away from the Earth? Is this a result of the ...

moon gravity  
asked by RhysW 11 votes
answered by Undo 12 votes

Age of the universe and time dilation

Given our knowledge and the standard cosmological model, we estimate that the age of the universe is about 13.7 billion years old. How much sense does it make to talk about the age of the ...

universe space-time general-relativity special-relativity  
asked by toniedzwiedz 10 votes
answered by John Davis 8 votes
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