... The Orion Nebula and its surroundings present skygazers with a wondrous jumble of newborn stars, gas, and dust. ... Sagittarius Star Cloud . ... The color of a star indicates its surface temperature, an important property used to assign each star a spectral type. Most stars in the above Sagittarius Star Cloud are orange or red and relatively faint, as our Sun would appear. The Wind on Mars . ... The Earth's orbit is not a perfect, sun-centered circle. ... Venus Once Molten Surface . ...