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20 February 2010
ESA's Tough Choice: Dark Matter, Sun Close Flyby, Exoplanets (Pick Two)
Key questions relevant to fundamental physics and cosmology, namely the nature of the mysterious dark energy and dark matter (Euclid); the frequency of exoplanets around other stars, including Earth-analogs (PLATO); take the closest look at our Sun yet possible, approaching to just 62 solar radii (Solar Orbiter) … but only two! What would be your [...]
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18 August 2008
Ten Mysteries of the Solar System
We've all wondered at some point or another what mysteries our Solar System holds. After all, the eight planets (plus Pluto and all those other dwarf planets) orbit within a very small volume of the heliosphere (the volume of space dominated by the influence of the Sun), what's going on in the rest of the [...]
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31 May 2008
Warm Coronal Loops May Hold the Key to Hot Solar Atmosphere
Coronal loops, the elegant and bright structures threading through the solar surface and into the solar atmosphere, are key to understanding why the corona is so hot. Yes, it's the Sun, and yes, it's hot, but its atmosphere is too hot. The puzzle as to why the solar corona is hotter than the Sun's photosphere [...]
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07 February 2008
The "Astronomical Unit" May Need an Upgrade as the Sun Loses Mass
The Sun is constantly losing mass. Our closest star is shedding material through the solar wind, coronal mass ejections and by simply generating light. As the burning giant begins a new solar cycle, it continues to lose about 6 billion kilograms (that's approximately 16 Empire State Building's worth) of mass per second. This may seem [...]
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