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Eclipse chasers take three different routes to totality

NASHVILLE, Ind. — There’s nothing like a total solar eclipse to remind you of the unstoppability of nature — and the tenuousness of technology.

Not that we need much of a reminder: The challenges of climate change, ranging from floods to wildfires, and the problems caused by the coronavirus pandemic amply show the limits of humanity’s control over nature.

But chasing totality is a more benign example showing just how hard it is to predict which paths Mother Nature will take, and how technology may or may not catch up.

It was tricky to pinpoint the best place to see today’s total eclipse, because totality was visible only along a narrow track stretching from Mexico to Newfoundland, for no more than four and a half minutes over any location. If clouds roll in at 3:04 p.m., and totality begins at 3:05, there’s nothing OpenAI or SpaceX can do about it.

Based on historical precedent, a stretch of Texas around Austin was supposed to have the best chance of clear skies. Here in Nashville, a well-known tourist destination south of Indianapolis, the cloud-cover predictions varied from totally sunny to as much as 60% clouded over. Meanwhile, some air travelers hoped to catch sight of the blacked-out sun as they flew above the clouds. How did it all turn out? Check out three tales from GeekWire’s eclipse team.

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GeekWire

Totally cool! Three options for seeing the solar eclipse

After a seven-year gap, a total solar eclipse is once again due to make a coast-to-coast run across North America, boosting popular interest (and airfares) to astronomical proportions.

The track of totality for the April 8 eclipse doesn’t come anywhere close to the Pacific Northwest. That’s in contrast to the 2017 total solar eclipse, when the moon’s shadow crossed the Oregon coast to begin its continent-spanning sweep.

You can still get in on the thrill of the event. It’s not too late to book a last-minute trip to someplace within driving distance of the total eclipse’s path, which stretches from Mexico up through Texas and the Midwest to the northeastern U.S. and Atlantic Canada. It’s just going to cost you.

Outside the track of totality, a partial solar eclipse will be visible throughout Canada, Mexico and the Lower 48 states. That’s assuming skies are clear, which is nowhere near a sure thing for the Pacific Northwest in April. Even if the sun is visible, you’ll want to make sure you see the eclipse safely.

There’s one almost surefire way to catch totality, and that’s to watch it online. It’s no substitute for experiencing darkness at midday in person, but it’s a no-muss, no-fuss, low-cost way to get in on the action. And it might well whet your appetite for the next eclipse opportunity.

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Cosmic Space

How to watch the pandemic solar eclipse online

Total solar eclipses are typically magnets for world travelers with a scientific bent — but when it comes to the eclipse that’ll be visible from Chile and Argentina on Dec. 14, the coronavirus pandemic has put a damper on the dreams of eclipse-chasers.

Fortunately, there are lots of ways to see the solar eclipse online, and this way at least you don’t have to worry about hurting your eyes.

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GeekWire

Xplore wins award for solar observatory concept

Xcraft observing sun
Artwork shows Xplore’s Xcraft probe observing the sun in different spectral bands. (Xplore Illustration)

Seattle-based Xplore has won a $670,111 award from the National Oceanic and Atmospheric Administration to look into the feasibility of sending a solar observatory to a gravitational balance point that’s a million miles from Earth.

From that spot, known as the Earth-Sun L1 Lagrange Point, Xplore’s multi-mission Xcraft probe would monitor the sun and provide early detection of solar storms that could disrupt power grids and telecommunications on Earth.

Based on the outcome of Xplore’s study, which is due for completion in December, NOAA would decide whether or not to provide further support for the concept that the company comes up with.

Get the full story on GeekWire.

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GeekWire

Tethers Unlimited to support sun-watching mission

PUNCH mission
Four microsatellites will study how the sun’s outer atmosphere, or corona, imparts energy and mass to the solar wind during NASA’s PUNCH mission. (SwRI Illustration)

Bothell, Wash.-based Tethers Unlimited says it will provide key communications and propulsion capabilities to Southwest Research Institute in support of a NASA mission to study how the sun’s corona whips up the solar wind.

Tethers Unlimited’s SWIFT-XTS software-defined radio will be used for telemetry and control of the four suitcase-sized microsatellites that will conduct a mission known as PUNCH (Polarimeter to Unify the Corona and Heliosphere). And the company’s HYDROS-C water-electrolysis thruster will serve as the satellites’ propulsion system.

Last year NASA selected Southwest Research Institute, which has centers in Colorado and Texas, to lead the mission.

“Procuring these complete spacecraft subsystems ‘off-the-rack’ is critical to the PUNCH science,” Craig DeForest, a solar scientist at SwRI who serves as the mission’s principal investigator, said today in a news release. “The growing commercial ecosystem for space enables a constellation of four separate high-capability spacecraft, within the cost of a single traditionally-built satellite.”

The satellites will orbit Earth in formation to study how the corona, which serves as the sun’s outer atmosphere, infuses the solar wind with mass and energy. PUNCH’s satellites are due for launch as early as 2022.

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GeekWire

Solar Orbiter blasts off to study the sun, pole to pole

The Solar Orbiter spacecraft was launched tonight to begin a seven-year, $1.5 billion mission aimed at studying the sun and its mysterious magnetic field from an unprecedented vantage point.

Get the news brief from GeekWire.

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GeekWire

AI helps NASA get ahead of solar superstorms

Solar flare
An extreme ultraviolet image of the sun, captured by NASA’s Solar Dynamics Observatory, shows an X9.3 flare erupting at lower right during a solar storm in 2017. (NASA / Goddard / SDO Photo)

If the sun throws out a radiation blast of satellite-killing proportions someday, Amazon Web Services may well play a role in heading off a technological doomsday.

That’s the upshot of a project that has NASA working with AWS Professional Services and the Amazon Machine Learning Solutions Lab to learn more about the early warning signs of a solar superstorm, with the aid of artificial intelligence.

Get the full story on GeekWire.

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GeekWire

Why was solar observatory closed? (It wasn’t aliens)

Sunspot Solar Observatory
The Richard B. Dunn Solar Telescope is the centerpiece of the Sunspot Solar Observatory on Sacramento Peak in New Mexico. (National Science Foundation Photo)

After days of fighting rumors about alien visitations, the managers of the Sunspot Solar Observatory in New Mexico say they’re reopening the facility — and have shed more light on the reason for its 10-day security-related closure.

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GeekWire

Parker Solar Probe blasts off to ‘touch the sun’

Parker Solar Probe launch
A United Launch Alliance Delta 4 Heavy rocket sends NASA’s Parker Solar Probe spaceward from Cape Canaveral Air Force Station in Florida. (NASA via YouTube)

NASA today sent a super-shielded spacecraft known as the Parker Solar Probe on a mission that will take it closer to the sun than any other spacecraft has flown, with the probe’s namesake, a 91-year-old physicist, watching the launch.

A blazing United Launch Alliance Delta 4 Heavy rocket rose into the night sky from its launch pad at Cape Canaveral Air Force Station in Florida at 3:31 a.m. ET (12:31 a.m. PT), one day after concerns over a data glitch forced a postponement.

Three rocket stages powered the probe on the first leg of its sunward journey.

“All I can say is, wow, here we go, we’re in for some learning over the next several years,” University of Chicago solar physicist Eugene Parker said just after liftoff.

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GeekWire

How staring at the eclipse led to a world of hurt

Retina burn
An optical coherence tomography image of a woman’s left-eye retina shows a crescent-shaped scar. (Wu et al.. / JAMA Ophthalmology)

A medical case reported today in the journal JAMA Ophthalmology proved the wisdom of all those warnings not to stare at the partly covered sun during August’s solar eclipse.

Unfortunately, it’s too late for the woman at the center of the case: Now she has a permanent scar in her left eye’s retina, and a permanent black spot in her field of vision.

Get the full story on GeekWire.