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Robotic Spaceflight, Science, Solar System, Space Exploration

Cassini reveals Saturn is on a cosmic dimmer switch

The Sun sets over the Pacific Ocean in this stunning shot taken from the International Space Station.

The Sky This Week from January 3 to 10: Earth’s closest approach to the Sun

When the sky rained rocks

Mars at opposition in 2020

The Sky This Week from January 10 to 17: Mars reaches opposition

March 1, 2025, 40 minutes after sunset, looking west

The Sky This Week from February 28 to March 7: The Moon joins the planets

The Sky This Week from August 30 to September 8

Vernal equinox

The Sky This Week from March 14 to 21: The start of spring

How the Milky Way devours its neighbors

The Sky This Week for September 15 to 24

Jupiter and moons

The Sky This Week from March 21 to 28: Galilean moon action

The Sky This Week from May 10 to 19

Science, Solar System

Exclusive: New Horizons update 9