Astronomy Weekly Newsletter

Astronomy newsletter

Top new questions this week:

Why there is no smoke around the Sun?

Where there is fire, there is always smoke. So why there isn't any smoke near the Sun?

asked by Pritam 19 votes
answered by userLTK 25 votes

average number of exoplanets in a system

I was just wondering what the normal amount of planets is in a star system, because in my mind 8 planets seems like a relatively large amount. so are we above average? can we even see all the ...

asked by stanley dodds 3 votes
answered by Rob Jeffries 4 votes

How did water get on Earth

I recently read that water more then likely got here by comets (carrying water) hitting the Earth. However it also it says the impact of a comet hitting the Earth is much greater then an atomic bomb. ...

earth comets water  
asked by TheDudeAbides 2 votes
answered by AtmosphericPrisonEscape 2 votes

Does the sun have a feature like the red spot on Jupiter?

Does the sun have a feature or prominence like the red spot on Jupiter? Is there a feature that will remain as long as the red spot? Maybe beneath the surface?

star sun solar-system  
asked by Vincent Ashley 1 vote
answered by Rob Jeffries 0 votes

Find constellation over Earth coordinates on a specific date-time

I would like some help in finding the exact constellations, or some sort of visualization of the stars over an specific location an time. The idea is to find out the closest star or group of stars on ...

star constellations date-time positional-astronomy  
asked by darent 1 vote
answered by Rob Jeffries 1 vote

Why did Earth need material from comets to assemble the raw materials for life?

It's often speculated that matter from comets played a crucial role in the development of life on Earth. For example, Maps of Time says, Many of the ingredients of the early atmosphere (including ...

solar-system comets life origin-of-life  
asked by kuzzooroo 1 vote
answered by GingerBeard 1 vote

How can you determine the initial volume of a planet's atmosphere?

Since the surface pressure of a planet is determined by the mass of the column of gasses above it one would surmise that to determine the pressure you must know the volume and mass of the atmosphere. ...

atmosphere planetary-formation  
asked by td-lambda 1 vote

Greatest hits from previous weeks:

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 9 votes

Is Jupiter made entirely out of gas?

I heard that Jupiter is made out of gas. But in school I learned that Jupiter has gravity which is 2.5 times that of Earth (Gravity that can tear apart a comet) and gravity is proportional to mass. ...

gravity jupiter mass gas-giants core  
asked by strikers 13 votes
answered by Wayfaring Stranger 10 votes

Can you answer these?

Is there a simple, analytical formula for the lunar phase brightness curve?

Brightness of the lunar disk varies as a function of phase angle. This phenomenon is very well established, as is the increase in brightness at low phase angles. Is there a simple analytical formula ...

moon light moon-phases  
asked by qpo2 1 vote

Were the Voyager Golden Records tested for being decoded?

I was wondering if the microgroove golden records they put on the Voyager spacecraft, along with instruction on how to decode it, were first put to the test with the subjects most likely to decode ...

extra-terrestrial interstellar-travel space-probe  
asked by nmajoros 1 vote
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