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SDSS - The Largest Colour Image of the Sky Ever MadeThe Sloan Digital Sky Survey-III has released some incredible images of the night sky, and announced plans to image even more. Now, the first catalogues of spectroscopy results have been released online, allowing anyone to access this enormous collection of data...
Jupiter's Role in Asteroid ImpactsDoes Jupiter protect Earth from asteroid impact? A new study evaluates the myth that the giant planet acts as our protector, gravitationally slinging asteroids out of a collision course...
Rhea Gets the Cassini Flypast TreatmentNASA's Cassini spacecraft has completed an extremely close flyby of Saturn's moon Rhea, returning incredible pictures that allow us an unprecidented view of the surface features - including faults reminiscent of Enceladus' "Tiger Stripes"...
First Planck Science ResultsThis month, researchers working on the Planck project released their first science data - including new galaxy clusters and clouds of cold gas in the Milky Way. Plus, they announcea greater than expected data loss rate from cosmic rays - helping to plan future missions...
The incredible and erratic behaviour of Red DwarfsRed Dwarf stars seem to be far more active than previously thought - good news for astronomers, but terrible news for any habitable planets around them...
2000th Comet Spotted by SOHOData from the Solar and Heliospheric Observatory, or SOHO, has been used by amateur astronomers worldwide to spot comets. Over half of all known comets have been spotted in this way, and now a student in Poland has spotted SOHO's 2000th comet! |
Antimatter from Terrestrial ThunderstormsGamma ray flashes seemingly coming from thunderstorms have been a mystery since first being identified in 1994. Now, using the Gamma Ray Burst Monitor on the Fermi satellite, researchers have identified the cause as beams of antimatter streaming out into space...
Studying the Remains of the First StarsThe first stars ended the dark ages of the universe pouring heat, light and heavier elements into an otherwise cold, dark expanse. New research uses light from quasars to analyse the clouds left behind when some of these first stars exploded...How fast does gravity propagate?Does Gravity propagate instantaneously? In other words, to use a fancy analogy: I move the sun 10,000,000 km in 1 sec in 1 direction, will the earth move instantaneously or will the effect only propagate at light speed to reach the earth 8 mins later? My feeling is that the effect will be &q...Is it possible to plot a clear course when travelling at light speed?If we were to develop a spacecraft to travel at very high speed or near the speed of light (time travel) through space; wouldn't even a tiny grain of rice pose a serious danger? Is it possible to avoid all drifting space debris at this speed? Thank you for your time Regards; &...Why doesn't solar wind move dust on the moon?I know the moon doesn't have an atmosphere therefore the dust doesn't move, but if the solar wind is strong enough to remove an atmosphere from a planet, why doesn't it move the dust on the moon??? Keep up the great podcasts! Many thanks Andrea Lewis Hobart Tasmania Austra...Why doesn't the solstice coincide with the earliest dawn?Using the Southern Hemisphere as example, on or about 22 December (Summer Solstice), the Sun is overhead at its furthest point South (Tropic of Capricorn), causing the longest hours of daylight, for all places South of that Tropic, (and of course, the shortest for all places North). The situation is...Does Hawking radiation selectively emit matter, rather than antimatter?So here lies my first problem; I could see that if the anti particle got sucked in it would annihilate releasing energy (although I'm not sure where this energy would go?) and the black hole would get smaller, and the mass of the radiation would be equal to the reduction in mass of the B hole. So t...How fast would you have to run to outrun the sunset on the lunar surface?In Futurama episode 2, Fry and Leela outrun the sunset on the moon by hopping along ... How fast would you have to run to outrun the sunset on the lunar surface?The facts should be left to those who know the facts....
- 29th Jun 11
is the voting over?...
- 30th Jun 11
Fraid so Dr Junix. You can listen to the latest Naked Astronomy to find out which they decided upon. Last one I heard (which I think was t...
- 30th Jun 11
I have just realised what the section should have been called.
See the whole discussion | Make a commentThe A, B, C, and D of Astronomy - the presenters are Andrew, Ben, Carolin an... - 30th Jun 11
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