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NASA — Comply with, observe the Solar / And which approach the wind…

April 9, 2024
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NASA — Comply with, observe the Solar / And which approach the wind…
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Together with the Korea Astronomy and House Science Institute, or KASI, we’re on the brink of take a look at a brand new option to see the Solar, excessive over the New Mexico desert.

A balloon — which seems a translucent white pumpkin, however massive sufficient to hug a soccer discipline — will quickly take flight, carrying a photo voltaic scope known as BITSE. BITSE is a coronagraph, a particular type of telescope that blocks the intense face of the Solar to disclose its dimmer ambiance, known as the corona. BITSE stands for Balloon-borne Investigation of Temperature and Velocity of Electrons within the corona.

image

Its purpose? Explaining how the Solar spits out the photo voltaic wind, the stream of charged particles that blows continually from the Solar. Scientists typically comprehend it varieties within the corona, however precisely the way it does so is a thriller.

The photo voltaic wind is necessary as a result of it’s the stuff that fills the area round Earth and all the opposite planets in our photo voltaic system. And, understanding how the photo voltaic wind works is essential to predicting how photo voltaic eruptions journey. It’s a bit like a water slide: The way in which it flows determines how photo voltaic storms barrel via area. Typically, these storms crash into our planet’s magnetic discipline, sparking disturbances that may intervene with satellites and communications indicators we use day by day, like radio or GPS.

image

Proper now, scientists and engineers are in Fort Sumner, New Mexico, making ready to fly BITSE as much as the sting of the ambiance. BITSE will take photos of the corona, measuring the density, temperature and pace of negatively charged particles — known as electrons — within the photo voltaic wind. Scientists want these three issues to reply the query of how the photo voltaic wind varieties.

At some point, scientists hope to ship an instrument like BITSE to area, the place it might research the Solar day in and time out, and assist us perceive the highly effective forces that push the photo voltaic wind out to speeds of 1 million miles per hour. BITSE’s balloon flight is a crucial step in the direction of area, since it would assist this group of scientists and engineers fine-tune their tech for future space-bound missions.  

image

Hours earlier than dawn, technicians from our Columbia Scientific Balloon Facility’s discipline website in Fort Sumner will prepared the balloon for flight, partially filling the massive plastic envelope with helium. The balloon is manufactured from polyethylene — the identical stuff grocery baggage are manufactured from — and is about as thick as a plastic sandwich bag, however a lot stronger. Because the balloon rises greater into the sky, the fuel within the balloon expands and the balloon grows to full measurement.

BITSE will float 22 miles over the desert. For no less than six hours, it would drift, taking photos of the Solar’s seething sizzling ambiance. By the tip of the day, it would have collected 40 feature-length films’ price of knowledge.

image

BITSE’s journey to the sky started with an eclipse. Coronagraphs use a steel disk to imitate a complete photo voltaic eclipse — however as an alternative of the Moon sliding in between the Solar and Earth, the disk blocks the Solar’s face to disclose the dim corona. During the Aug. 21, 2017, total eclipse, our scientists examined key components of this instrument in Madras, Oregon.

image

Now, the scientists are stepping out from the Moon’s shadow. A balloon will take BITSE as much as the sting of the ambiance. Balloons are a low-cost option to discover this a part of the sky, permitting scientists to make higher measurements and carry out checks they will’t from the bottom.

BITSE carries several important technologies. It’s constructed on one stage of lens, reasonably than three, like conventional coronagraphs. Which means it’s designed extra merely, and fewer prone to have a mechanical drawback. And, it has a pair totally different units of specialised filters that seize totally different sorts of sunshine: polarized gentle — gentle waves that bob in sure instructions — and particular wavelengths of sunshine. The mixture of those photos gives scientists with data on the density, temperature and pace of electrons within the corona.

image

Greater than 22 miles over the bottom, BITSE will fly excessive above birds, airplanes, climate and the blue sky itself. Because the ambiance thins out, there are much less air particles to scatter gentle. Which means at BITSE’s altitude, the sky is dimmer. These are good circumstances for a coronagraph, whose purpose is taking photos of the dim corona. However even the higher ambiance is brighter than area.

That’s why scientists are so keen to check BITSE on this balloon, and develop their instrument for a future area mission. The photo voltaic scope is designed to coach its eyes on a slice of the corona that’s not well-studied, and key to photo voltaic wind formation. At some point, a model of BITSE might do that from area, serving to scientists collect new clues to the origins of the photo voltaic wind.  

image

On the finish of BITSE’s flight, the crew on the Fort Sumner discipline website will ship termination instructions, kicking off a sequence that separates the instrument and balloon, deploys the instrument’s parachute, and punctures the balloon. An airplane circling overhead will hold watch over the balloon’s ultimate moments, and relay BITSE’s location. On the finish of its flight, removed from the place it began, the coronagraph will parachute to the bottom. A crew will drive into the desert to get better each the balloon and BITSE on the finish of the day.

For extra data on how we use balloons for high-altitude science missions, go to:

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