Category: astronomy

March 22, 1997: Comet Hale–Bopp made its close…

March 22, 1997: Comet Hale–Bopp made its closest approach to Earth, passing within about 122 million miles. (NASA: 1, 2, 3)

Comet Hale–Bopp made its closest approach to E…

Comet Hale–Bopp made its closest approach to Earth on this day in 1997, passing within about 122 million miles. (NASA: 1, 2)

“Cosmic Calendar” — Carl Sagan takes us on a t…

“Cosmic Calendar” — Carl Sagan takes us on a tour of the history of the cosmos.

Astronauts on Iapetus, moon of Saturn, illustr…

Astronauts on Iapetus, moon of Saturn, illustrated by Ron Miller.

TODAY IN HISTORY: The Moon in total eclipse on…

TODAY IN HISTORY: The Moon in total eclipse on March 19, 1848, “her disc visible while immersed in the dark Shadow.” From an 1869 edition of The Atlas of Astronomy by Alexander Keith Johnston.

(David Rumsey Map Collection)

Saturn, observed by the Cassini probe on March…

Saturn, observed by the Cassini probe on March 19, 2016.

Beautiful Saturn, observed by the Cassini prob…

Beautiful Saturn, observed by the Cassini probe from a distance of 766,834 miles (1,234,099 kilometers) on February 4, 2007.

Carl Sagan on Cosmos: “Our ancestors worshippe…

Carl Sagan on Cosmos: “Our ancestors worshipped the sun, and they were far from foolish. It makes good sense to revere the sun and the stars. Because we are their children.”

“The universe seems neither benign nor hostile…

“The universe seems neither benign nor hostile, merely indifferent to the concerns of such puny creatures as we are.”

—Carl Sagan

The rings of Saturn and moon Enceladus, observ…

The rings of Saturn and moon Enceladus, observed by the Cassini space probe on October 28, 2015. (NASA)