Astronomy Weekly Newsletter

Astronomy newsletter

Top new questions this week:

How were the designations of "North" and "South" applied to the hemispheres of Mars?

How was it decided which hemisphere was North and which hemisphere was South on Mars? Clearly, the designations "North" and "South" apply only to the hemispheres which contain the axis of rotation at …

mars naming  
asked by called2voyage 6 votes
answered by called2voyage 6 votes

Can two comets travel together as one?

If two comets come together in space, will they bounce apart, merge into a single body, or could they travel together through space, either touching or orbiting a shared center of gravity?

asked by James Jenkins 6 votes
answered by called2voyage 11 votes

How does a gravity slingshot actually work?

From what I know of elliptical orbits, an object speeds up near the periapsis and slows down at the apoapsis, much like we learned in high school physics how a sphere would roll down and back up a …

orbit gravity astrophysics  
asked by Supuhstar 4 votes
answered by Takku 1 vote

Can the asteroid belt be seen from Jupiter?

Suppose that someone lives in the neighborhood of Jupiter. He may live in a space station around Jupiter, or in any ot it's moons (I believe that it doesn't matter for this question). If this person …

jupiter asteroid-belt  
asked by Metalcoder 4 votes
answered by LocalFluff 5 votes

How massive does a planet need to be to create gravitational lensing?

Is it ever possible for starlight to be distorted in a noticeable way from something as small as a planet? I'm guessing that the chances of this working are better on a dense terrestrial planet than …

gravity light gravitational-lensing  
asked by brentonstrine 1 vote
answered by LocalFluff 0 votes

What is the time/size/rigidity ratio for a space object to become mostly round?

In the answer here multiple comets are identified that do not form a single round body. A drop of water will form a round shape in the time it takes to free fall a couple of feet. All of the …

gravity hydrostatic-equilibrium  
asked by James Jenkins 1 vote
answered by Florin Andrei 2 votes

Do planetary radio frequency change upon alignments?

If Neptune would align Uranus, would the radio frequency perceived on Earth increase? Are the radio antennas on NM capable of getting the 2 different radio frequencies feom both planets or would they …

planets radio-astronomy  
asked by ConejoEpileptico 1 vote
answered by Florin Andrei 0 votes

Greatest hits from previous weeks:

Why is the solar system often shown as a 2D plane?

Whenever I have learned about the solar system I always see the orbits displayed as a virtually flat plane. Are all of the orbits in the solar system really like this? If so, why? It seems like a …

orbit solar-system  
asked by Dgrin91 6 votes
answered by gerrit 9 votes

First night on a telescope questions

So I recently got into astronomy and I am using my fathers old Meade EQ1-B reflector telescope. This is my first night using it and I have come across a few questions. To begin, the telescope was left …

star telescope  
asked by Harry Kitchener 2 votes
answered by Florin Andrei 10 votes
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