The Unexpected: The Solar System

Looking back on the more than twelve years of science from NASA’s Chandra X-ray Observatory and trying to predict what it will find in the future, one thing is certain: we can expect the unexpected.

This blog series will look at both some of the anticipated findings from the past dozen or so years, plus some of the unexpected results so far from the Chandra mission. Today, we look at discoveries involving our Solar System.

Expected and Detected:
X-ray emission was detected from the atmospheres of planets and comets. The X-rays are produced when solar X-rays and high-speed particles flowing away from the Sun hit these atmospheres. The observed X-radiation provides information on the outer atmospheres of these objects that is difficult to obtain with other telescopes.

Comet C/1999 S4

More information:
http://chandra.harvard.edu/press/00_releases/press_072700.html
http://chandra.harvard.edu/photo/2001/venus/
http://chandra.harvard.edu/photo/2002/mars/

Chandra X-ray Image of Jupiter

Unexpected: The X-radiation from Jupiter's aurora, the equivalent of Earth's Northern Lights, was discovered to be located very near Jupiter’s poles, suggesting that the auroral X-rays are produced by particles streaming along Jupiter’s magnetic field all the way from Jupiter's moon Io.

More information:

http://chandra.harvard.edu/press/05_releases/press_030205.html

Saturn

Unexpected: The strongest X-ray emission from Saturn came from its equatorial regions and varied with solar activity, suggesting that Saturn acts like a surprisingly efficient X-ray mirror that reflects X-rays from the Sun.

More information:

http://chandra.harvard.edu/press/04_releases/press_030804.html

Saturn's Rings

Unexpected: The discovery of X-rays from Saturn's rings, from a source that is still unknown. It could be due to beams of energetic electrons produced in lightning storms on Saturn.

More information:

http://chandra.harvard.edu/photo/2005/saturn_rngs/

Category: 
Disclaimer: This service is provided as a free forum for registered users. Users' comments do not reflect the views of the Chandra X-ray Center and the Harvard-Smithsonian Center for Astrophysics.
Please note this is a moderated blog. No pornography, spam, profanity or discriminatory remarks are allowed. No personal attacks are allowed. Users should stay on topic to keep it relevant for the readers.
Read the privacy statement