DICTIONARY LOOKUP
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The Tilted Planet
Uranus is the only giant planet whose equator is nearly at right angles to its orbit. A collision with an Earth-sized object may explain the unique tilt. Nearly a twin in size to Neptune, Uranus has more methane in its mainly hydrogen and helium atmosphere than Jupiter or Saturn. Methane gives Uranus its blue tint.

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X-ray

Light that is so blue humans cannot see it. A band of the spectrum between the ultraviolet and the gamma-ray. Photons of X-ray light are more energetic than photons in the ultraviolet but less energetic than photons in the gamma-ray. X-radiation can go through human skin tissue but is stopped by dense bones. This property thus makes X-rays valuable in medicine. It is also useful in observing outer space. Scientists used X-rays to discover strange auroral disturbances at Jupiter's north and south poles. (See image on right)

X-Ray Image of Jupiter
 
Can't find it? Don't understand it? Ask us.
Q
X-ray

Light that is so blue humans cannot see it. A band of the spectrum between the ultraviolet and the gamma-ray. Photons of X-ray light are more energetic than photons in the ultraviolet but less energetic than photons in the gamma-ray. X-radiation can go through human skin tissue but is stopped by dense bones. This property thus makes X-rays valuable in medicine. It is also useful in observing outer space. Scientists used X-rays to discover strange auroral disturbances at Jupiter's north and south poles. (See image on right)

X-Ray Image of Jupiter