|Expected & 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.
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.
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.
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