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Astronomy Essentials
Tonight
Visible planets and night sky guide for November
Visible planets and night sky guide: November is a great month for both planets and meteor showers! Here's how to see Venus, Jupiter, Mars, Saturn and the ongoing Taurids.
November 9, 2026
Sun
Sun news: Auroras continue! More tonight at northern U.S. latitudes?
Sun news November 9, 2026: Fast solar wind topped 800 km/s, keeping G1 storms going. AR4566 fired another M flare. Auroras possible tonight!
Human World
Space
Carl Sagan born 92 years ago today
Carl Sagan was born on November 9, 1934. He contributed to science and helped millions around the globe see why astronomy matters.
November 9, 2026
Space
Backward world? Rubin finds a retrograde object past Neptune
The Rubin Observatory in Chile has discovered a retrograde object in our solar system. It circles the sun in a highly inclined orbit beyond Neptune.
November 8, 2026
Moon Phases
Do we all see the same moon phase from Earth?
No matter where you are on Earth, we all see the same moon phase. So why can the moon look tilted, or even upside down, depending on where you are?
November 8, 2026
Space
Active volcanoes on Mars? Noxious gas discovery says — maybe
Are there still active volcanoes on Mars? New detections of hydrogen chloride from below the surface suggest flowing magma.
November 6, 2026
Earth
Traces of dinosaur blood found for the 1st time?
For the 1st time, scientists say they've found traces of dinosaur blood. It comes from a 115-million-year-old fossil dinosaur bone from Brazil.
November 6, 2026
Constellations
The constellation Andromeda the Chained Lady
The constellation Andromeda the Chained Lady is most famous for containing M31, the Andromeda Galaxy, the closest large spiral galaxy to the Milky Way.
November 6, 2026
Space
Hera mission begins asteroid defense investigation: 1st closeup views!
The Hera mission just got its 1st closeup view of Didymos and its little moonlet Dimorphos. Soon it will begin investigating the aftermath of the DART impact.
November 5, 2026
Space
Swift spacecraft fell back to Earth in a fiery blaze
The Swift spacecraft fell back to Earth as a fiery streak of light on November 4. See videos here of its blazing reentry into Earth's atmosphere.
November 5, 2026
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