Carl Sagan's Cosmic Calendar, in which the entire 13.75 billion-year history of the universe is scaled down to a single year. At this scale, the Earth formed in August, life arose in September, and the first land plants appeared in mid-December. Apes did not appear until the very last day of the year. The first humans show up in the last six minutes and civilization in the final 30 seconds.

Carl Sagan's Cosmic Calendar, in which the entire 13.75 billion-year history of the universe is scaled down to a single year. At this scale, the Earth formed in August, life arose in September, and the first land plants appeared in mid-December. Apes did not appear until the very last day of the year. The first humans show up in the last six minutes and civilization in the final 30 seconds.

2017 Cosmic Calendar // Spiral Spectrum [CHAKRA, MOON & ASTROLOGY Mandala Art/Chart] 18x24 Full Color Poster

Lunar | Moon | Astrology | 2017 Cosmic Calendar with Zodiac, Chakras as Mandala Art / Chart] 18"x24" Full Color Poster

2017 Cosmic Calendar // Spiral Spectrum [CHAKRA, MOON & ASTROLOGY Mandala Art/Chart] 18x24 Full Color Poster

Magic Happens When Women Gather: Red Tent Moon Phase & Lunar Cycle Art Print

Magic Happens When Women Gather: Red Tent Moon Phase & Lunar Cycle Art Print

Here's a calendar of 2017's astronomical events for sky watchers, many of which can been seen with the naked eye. Keep looking up!

Here's a calendar of 2017's astronomical events for sky watchers, many of which can been seen with the naked eye. Keep looking up!

Watch the Sky — Cosmic Calendar

Watch the Sky — Cosmic Calendar

Watch the Sky — Cosmic Calendar

Watch the Sky — Cosmic Calendar

A cosmic year is the amount of time it takes for the sun to revolve around the center of the Milky Way

A cosmic year is the amount of time it takes for the sun to revolve around the center of the Milky Way

Watch the Sky — Cosmic Calendar

Watch the Sky — Cosmic Calendar

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