October 9: Capricornus
Despite its fame as a member of the zodiac, Capricornus is tough to see. It’s the smallest member of the zodiac, and one of the faintest. It forms a distinctive pattern, though, like the bottom of a bikini bathing suit.
October 10: Messier 30
A cluster from another galaxy scoots across the south on October evenings. Messier 30, in the lower left corner of Capricornus, is a family of hundreds of thousands of stars. They probably came from another galaxy, which was consumed by the Milky Way.
October 11: Moon and Jupiter
Brilliant Jupiter, the largest planet in the solar system, lines up below the Moon in early evening. It looks like a brilliant star, with a bit of a creamy color.
October 12: Andromeda Galaxies
The Andromeda galaxy is in the east-northeast at nightfall. Under dark skies, it looks like a smudge of light. It’s a family of hundreds of billions of stars. It is 2.5 million light-years away — the farthest object easily visible to the eye alone.
October 13: Telling Tails
Deneb Algedi, the tail of the sea-goat, is in the southern sky at nightfall, in the constellation Capricornus. Deneb Algedi is a good bit bigger and hotter than the Sun, and much farther along in life.
October 14: Moon and Saturn
Saturn, the second-largest planet in the solar system, huddles quite close to the Moon tonight. The giant planet looks like a bright golden star to the left of the Moon.
October 15: Collision Zones
Auriga, the charioteer, climbs into view in the northeast by about 9 p.m. It’s marked by yellow-orange Capella, one of the brightest stars in northern skies.