Score
Title
95
AskScience Panel of Scientists XVIII
544
AskScience AMA Series: I am Melinda Krahenbuhl and I am the director of the Reed Research Reactor, the only nuclear reactor operated primarily by undergraduate students. AMA!
8935
What elements are at genuine risk of running out and what are the implications of them running out?
270
Can you break sound barrier under water or any other material?
4027
What’s the largest star system in number of planets?
18
Why does plastic turn white at the creases when folded/bent?
2
How does radiation poisoning work?
3
How does thermal imaging work?
21
Do microwaves leave residual changes to molecules after heating?
2
How is the height of the mountain measured?
4
Can a setup of hall engines provide enough thrust to keep a satellite stationary above earth?
2
Does the temperature have any (noticable) effect on air resistance?
8
How does a memristor work?
3828
What is the effect, positive or negative, of receiving multiple immunizations at the same time; such as when the military goes through "shot lines" to receive all deployment related vaccines?
3
If a planet had a radius that was equal to the altitude of Earth’s geosynchronous orbit, but had the same mass and rotational period as the Earth now, would there be reduced or zero gravity on the surface?
1
What is lost and what is preserved in a particle collider?
8
Why does snow melt in the sunlight, even when the temperature outside is below freezing?
12
Mar's summer temperature can be 20 celsius. Could a human survive with just an oxygen mask?
2
Is there an altitude at which there is no longer a speed of sound?
0
How would a moving target affect the rate of nuclear fission vs a stationary target?
13
What would a spaceship moving at 0.9c firing lasers both in front of it and behind it look like to an external reference frame?
6
Does adiabatic warming occur when air descends in the Earth's polar cells?
24
How does the cosmic microwave background persist? Why hasn't it been distorted and destroyed by new sources of energy pumping into space?
8
How does cancer metastasis work?
5
Can a comet maintain an atmosphere?
1
How does RFID blocking material work?
0
Does the Meissner effect relate to Lenzs law?
8
Why hasn't The Asteroid Belt formed a planet?
10
Can you use a normal (CMOS) camera for detecting scintillation?
3
How do people know that the Island of Stability exists? And could there possibly be another "island" after it?
56
How can brain cells cause tumours even though they can not multiply?
7
How far back can you go before carbon dating becomes unreliable?
2
How does a computer process “simple” events?
1575
Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
4
What is the nonrenewable fuel cost to produce x quantity of electricity?
1125
What triggers beta particles to form, and for what reason can they not penetrate substantially thick aluminium?
0
What is the strongest a magnet could be?
1237
If capacitance increases as distance between plates decreases, why aren't there very small 1F capacitors?
0
What makes astronomers think life in general isn't possible on gas giants?
2
How applicable are Newtonian Physics in real life? Is it completely false or are there some concepts which can be used to accurately predict real-life situations?
1055
is it possible to move an object in circular motion using magnets?
5
What would hydrogen in metal form look like?
7 jswhitten Yes. Here's one example: http://www.astronexus.com/endeavour/chart It starts at looking from Earth toward Orion. Replace "Earth" with "Alpha Centauri". As you might expect, the sky looks mostly the same, but a few of the nearby stars have moved. For example, Sirius is right next to Betelgeuse, and there is a first magnitude star in Cassiopeia: the Sun. Also try [Space Engine](http://spaceengine.org/).
2 contact_fusion I'm not sure if anyone has actually done this, but you can in principle. For all the stars you want to include in your star chart, if you know precisely the distance between that star and our system, and the distance to where you want to center your star chart, you could make this new star chart using ordinary geometry. Of course, practically speaking, distances are not always that easy to get. Another practical consideration would be the orientation of the star chart. If you were on a planet in, say, the Alpha Centauri system, it is not likely that the ecliptic of your orbit would have the same orientation with respect to the Milky Way as Earth's orientation. But this wouldn't affect the relative location of the stars or the shapes of the new "constellations;" rather, this would affect where they appeared in the sky relative to your new day and night. It would also affect the orientation of the Milky Way on your night sky, relative to your horizon. How much this star chart would change from Earth's depends on how far away you are going. Almost all of the stars in your chart are close by, relatively speaking - within a few hundred lightyears. So the locations of these stars could change dramatically. There could be a few new stars on your chart, but if you are only going nearby, like Alpha Centauri, probably not many.
8 0 jswhitten Yes. Here's one example: http://www.astronexus.com/endeavour/chart It starts at looking from Earth toward Orion. Replace "Earth" with "Alpha Centauri". As you might expect, the sky looks mostly the same, but a few of the nearby stars have moved. For example, Sirius is right next to Betelgeuse, and there is a first magnitude star in Cassiopeia: the Sun. Also try [Space Engine](http://spaceengine.org/).
2 0 contact_fusion I'm not sure if anyone has actually done this, but you can in principle. For all the stars you want to include in your star chart, if you know precisely the distance between that star and our system, and the distance to where you want to center your star chart, you could make this new star chart using ordinary geometry. Of course, practically speaking, distances are not always that easy to get. Another practical consideration would be the orientation of the star chart. If you were on a planet in, say, the Alpha Centauri system, it is not likely that the ecliptic of your orbit would have the same orientation with respect to the Milky Way as Earth's orientation. But this wouldn't affect the relative location of the stars or the shapes of the new "constellations;" rather, this would affect where they appeared in the sky relative to your new day and night. It would also affect the orientation of the Milky Way on your night sky, relative to your horizon. How much this star chart would change from Earth's depends on how far away you are going. Almost all of the stars in your chart are close by, relatively speaking - within a few hundred lightyears. So the locations of these stars could change dramatically. There could be a few new stars on your chart, but if you are only going nearby, like Alpha Centauri, probably not many.