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Latest Exosphere Stories

b8a9c24e14e1e1b25edcc4372a6d07f41
2011-04-20 08:45:25

Mercury's Exosphere: A Brief Overview One of the primary science goals of MESSENGER is to study Mercury's very thin atmosphere, or exosphere. Although observations of the exosphere from orbit have begun, these data must be carefully calibrated, and analysis is still underway. In the meantime, here is a primer on Mercury's exosphere: what it is, how we observe it, and why it is important. What Is Mercury's Exosphere? Mercury's atmosphere is so tenuous that the atoms or molecules comprising it...

00bcfdae77e4e804ca181de21360c3031
2010-08-16 12:35:00

Imagine floating 35,000 miles above the sunny side of Earth. Our home planet gleams below, a majestic whorl of color and texture. All seems calm around you. With no satellites or space debris to dodge, you can just relax and enjoy the black emptiness of space. But looks can be deceiving. In reality, you've unknowingly jumped into an invisible mosh pit of electromagnetic mayhem "” the place in space where a supersonic "wind" of charged particles from the Sun crashes head-on into the...

9c94737d7ffed2bf11fccf4eddf2635e1
2009-10-23 14:29:18

Right now, the Moon is a ghost town. Nothing stirs. Here and there, an abandoned Apollo rover "” or the dusty base of a lunar lander "” linger as silent testimony to past human activity. But these days, only occasional asteroid impacts disrupt the decades-long spell of profound stillness. And this stillness presents scientists with an important opportunity. Currently, the Moon's tenuous atmosphere is relatively undisturbed. But that won't be true for long. NASA is planning to...


Word of the Day
omadhaun
  • A fool; a simpleton: a term of abuse common in Ireland and to a less extent in the Gaelic-speaking parts of Scotland.
This word is partly Irish in origin.