Jupiter: The fifth planet away from
the Sun, it is the largest planet in our solar system.
Caption: Chandra's image of Jupiter
provided some major surprises to scientists who study X-rays
emanating from the planet. During the 10-hour observation which
allowed Jupiter to complete an entire rotation, an X-ray hot
spot that pulsated every 45 minutes was discovered near the
north magnetic pole. Earlier theories held that X-rays were
produced when particles flowing from Jupiter's moon Io became
trapped in Jupiter's magnetic field. Now it appears that the
particles must come from a much more distant source, such as the
Sun, to explain the observed hot spot and pulsations.
Scale: Image is 1.5 arcmin on a
Chandra X-ray Observatory HRC Image
CXC operated for
NASA by the Smithsonian Astrophysical