X-CLASS SOLAR FLARE: Earth-orbiting satellites have just detected a strong X1.8-class solar flare (Feb. 21 @ 2307 UT). The source is giant sunspot AR3590. Extreme ultraviolet radiation from the flare caused a shortwave radio blackout over the western USA and Pacific Ocean. Stay tuned for information about a possible Earth-directed CME. Solar flare alerts: SMS Text
Above: The extreme UV flash from today's X1.8-class flare. Credit: NASA/SDO
SOLAR ECLIPSE COMET: Anticipation is building for a rare sight during this April's total solar eclipse. In addition to the sun's corona, there's going to be a comet. 12P/Pons-Brooks will be close to the sun during totality, potentially visible to the naked eye inside the Moon's shadow.
Here's what it looks like right now:
Click to view the rest of the comet's tail
Michael Jaeger photographed the comet from his backyard observatory in Austria on Feb. 16th. "The comet's tail is magnificent," he says. "It is currently more than 2.5 degrees long."
At the moment, 12P is invisible to the naked eye; you need a telescope to see it. However, it is approaching the sun for a close encounter in April. Between now and then, forecasters expect the comet's brightness to increase at least 40-fold to magnitude +4.0. That would make it a borderline naked-eye object just in time for the eclipse.
"Border-line naked eye" doesn't sound spectacular, but 12P may have a trick up its sleeve. The comet is famously variable, with surges in brightness that no astronomer can fully predict. 12P is festooned with ice geysers, old-faithful-like vents that spew plumes of gas and dust into space, cloaking the comet in a veil of sunlight-reflecting material. An eruption of one of these geysers during (or even around the same time as) the solar eclipse could catapult it into the realm of magnificent.
The eruptions are not rare. Astronomers recorded at least half-a-dozen in 2023. One of them increased the comet's brightness more than 100-fold (5 magnitudes). These outbursts may become even more frequent as the comet approaches the sun and heat opens more vents.
A tip for eclipse photographers: Take two cameras--one for the sun, and another for Comet 12P. You might be glad you did.
Observing Tip: Venus and Jupiter will be visible, too. Venus will be very bright and shine 15º from the sun even before totality begins, while Jupiter, 30º from the sun, will appear during totality. Comet 12P will be close to Jupiter. [sky map]
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18K GOLD "LOVE YOU TO THE MOON" LOCKET: This is a very special locket. It's heart-shaped, plated with 18K gold, and we will fly it again during this year's total eclipse of the sun. Keep reading...
On Jan. 26, 2024, the students of Earth to Sky Calculus launched this locket to the stratosphere onboard a cosmic ray research balloon. At the apex of the flight, it floated 111,535 feet above the Sierra Nevada mountains of central California:
Buy it now for $149.95, and we'll fly it again--FOR FREE--during the total solar eclipse on April 8, 2024. The students will be launching multiple balloons from the path of totality in Texas. Your pendant will go along for the ride, touching the shadow of the Moon at the edge of space. (Simply type "FLY IT AGAIN" in the comments box at checkout.)
The locket, which opens to hold a personal photo or other small item, comes with a greeting card showing the jewelry in flight and telling the story of its journey to the edge of space.
Far Out Gifts: Earth to Sky Store
All sales support hands-on STEM education
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