0:40Video · The Sun and Space Weather
A Solar Storm Set Telegraphs on Fire
In 1859, the aurora became part of the electrical grid.
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Featured story · 1:15The Asteroid That Turned Air Into a Bomb
Tunguska flattened a forest without making a crater: the atmosphere became the weapon.
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The Sun and Space Weather
Five linked stories turn sunlight, solar sound, magnetism, storms, and neutrinos into one continuous journey from the core of the Sun to your body.
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0:401:15Video · Cosmic Impacts and Planetary Defense
The Asteroid That Turned Air Into a Bomb
Tunguska flattened a forest without making a crater: the atmosphere became the weapon.
0:50Video · Your Moving Universe
You Have Never Been in the Same Place Twice
Standing still is only a local illusion; Earth carries you through a path that never closes.
5:06Video · Worlds Gone Wrong
Earth’s Twin Went Wrong—Here’s How
Venus began with Earth-like ingredients and became a world that melts lead.
1:32Video · The Sun and Space Weather
The Sun Has a Hidden Heartbeat
We mapped the inside of a star by watching its surface tremble.
1:31Video · Hidden Physics
There’s a Real Sound Coming From a Black Hole
Space can carry sound when it contains enough gas—and one cluster has been resonating for billions of years.
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Binocular Cluster Starter Pack: 5 Targets
Five star clusters with wide-field payoff for binocular observers.
By Rick Wood · Updated July 16, 2026SkyNotes · Published archive
StarPixels Sky Notes: Week of September 9–16
An archived weekly sky briefing preserved at its original URL.
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The Asteroid That Turned Air Into a Bomb
What the 1908 Tunguska airburst reveals about impact energy, missing craters, and planetary defense.