Heat

It's hot here, too - Mercury, from Mariner

X-ray Moon

Fluorescence due to sunlight- the Moon, from Chandra

Ruler

Seen in more detail than ever before, from a spacecraft that was just passing by - Jupiter, from Cassini

Rafts

Varied terrain due to liquid water underneath? - ice rafts on Europa, from Galileo

Twilight

Sunset on Mars - Gusev crater vista, from Spirit

Binary

For all of us who have dreamed under double suns - Albireo, from Pomona College astronomy students

Making Waves

Ripples caused by gravity - a new moon in Saturn's rings, from Cassini

Back On Duty

After work made me feel like I was spiraling - a new view of the Sombrero galaxy, from Spitzer