ISS transiting the Sun

Wang Letian

It’s not uncommon to spot the International Space Station as a light moving across the sky just after sunset or before sunrise, when the Sun’s light reflects off it. The view you see here, though, is far from common. Chinese astrophotographer Wang Letian used a solar telescope and specialized camera to capture this series of photos, combined into a single image of the ISS passing in front of the Sun. You can see several gaseous prominences around the edge of the Sun as well as a dark sunspot.

A labor of love. Unique beauty the result.

Text describing the photo is from the Planetary Society newsletter, The Downlink.

Unique photo of the sun

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9 mo. ago
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I’ll Drink to That
I’ll start by reiterating that this image is heavily software-processed. The photo was shot on a backyard solar telescope, then edited to progressively accentuate the contrasting features.
The end result is a clear depiction of the turbulent nature of the solar chromosphere. This type of photography is an incredible challenge due to the overwhelming light of the photosphere below. Solar images are always software-processed to reveal contrast. I took those methods as far as I could, and then some!
The bright spot you see near the limb of the Sun is a giant sunspot in Active Region 2804. This sunspot is big enough to swallow the Earth whole!
To see more of my space photography, you can always find me on Instagram @thevastreaches
🌞 —> 🔭
Explore Scientific AR152
Daystar Quark Chromosphere
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February 27, 2021
1250/5000 stacked

An amazing piece of work. Didn’t mention it in his post, but, I’ve read this starts with 150,000 individual photos of segments of the sun. Taken in his backyard.

Huge Solar Flare Disrupts GPS Satellites Globally


❝ The Sun’s impact on weather here on Earth is clear: It makes it hot or cold, it powers air currents, it causes water to evaporate making rain, et cetera. But with our increasing reliance on satellites and electronics, you can’t forget its more insidious effects — and some satellites got a taste of those…

Around 5:10 and 8:00AM eastern time, the Sun let out a hiccup and then a loud belch — the largest solar flare in twelve years. These large events are typically harmless to those on the ground, but this one could have potentially disrupted GPS communication yesterday morning.

❝ The flares came from part of the sun called AR 2673…The two flares fell into the X class of most powerful events, one registering an X2.2…and the second registering an X9.3…This second flare was the largest since 2005, and the eighth-largest on record.

These flares come as the Sun is weakening in its 11 year cycle, and X9.3 is especially intense as solar activity approaches its minimum. According to reporting by New Scientist, the storm temporarily disrupted GPS and radio communications…

❝ Space weather isn’t something you necessarily need to worry about, but it’s definitely something engineers and anyone involved with electronics needs to consider…

There’s even an “oops” moment where the article provides a rationale for Trump’s ignorant maundering about vote recording. Not that facts have much to do with his thought processes.

NASA, SDO: Year 5

February 11, 2015 marks five years in space for NASA’s Solar Dynamics Observatory, which provides incredibly detailed images of the whole sun 24 hours a day. Capturing an image more than once per second, SDO has provided an unprecedentedly clear picture of how massive explosions on the sun grow and erupt ever since its launch on Feb. 11, 2010. The imagery is also captivating, allowing one to watch the constant ballet of solar material through the sun’s atmosphere, the corona.

Turn up the sound. Set resolution as high as you can. A stunning video.

Hinode satellite recorded X-ray footage of solar eclipse

Click to enlarge

On October 23rd, while North America was witnessing a partial eclipse of the sun, the Hinode spacecraft observed a “ring of fire” or annular eclipse from its location hundreds of miles above the North Pole. This image was taken by the X-ray Telescope – the XRT.

The Hinode spacecraft was in the right place at the right time to catch the solar eclipse. What’s more, because of its vantage point Hinode witnessed a “ring of fire” or annular eclipse…

…The XRT was developed and built by the Smithsonian Astrophysical Observatory and the Japan Aerospace Exploration Agency. Hinode’s X-ray Telescope is the highest resolution solar X-ray telescope ever flown.

The XRT collects X-rays emitted from the sun’s corona — the hot, tenuous outer layer that extends from the sun’s visible surface into the inner solar system. Gas in the solar corona reaches temperatures of millions of degrees. The energy source that heats the corona is a puzzle. The sun’s surface is only 10,000 degrees Fahrenheit, while the corona is more than 100 times hotter.

Science is so beautiful. But, then, the quest for truth always is.

Thanks, Ursarodinia

Partial eclipse of the sun, today

Partial eclipse

Sunsets are always pretty. One sunset this month could be out of this world. On Thursday, Oct. 23rd, the setting sun across eastern parts of the USA will be red, beautiful and … crescent-shaped.

“It’s a partial solar eclipse,” explains longtime NASA eclipse expert Fred Espenak. In other words, the New Moon is going to ‘take a bite’ out of the sun…

The partial eclipse of Oct. 23rd will be visible from all of the United States except Hawaii and New England. Coverage ranges from 12% in Florida to nearly 70% in Alaska. Weather permitting, almost everyone in North America will be able to see the crescent.

The eclipse will be especially beautiful in eastern parts of the USA, where the Moon and sun line up at the end of the day, transforming the usual sunset into something weird and wonderful…

A partial eclipse may not be total, but it is totally fun.

See for yourself on Oct. 23rd. The action begins at approximately 6 pm on the east coast, and 2 pm on the west coast. Check NASA’s Eclipse Home Page for viewing times near your hometown.

Thanks, Ursarodinia

Pic of the Day

solar filament eruprs
Click to enlargeImage Credit: NASA’s GSFC, SDO AIA Team

What’s happened to our Sun? Nothing very unusual — it just threw a filament. [Kind of like a plasma furball]

Toward the middle of 2012, a long standing solar filament suddenly erupted into space producing an energetic Coronal Mass Ejection (CME). The filament had been held up for days by the Sun’s ever changing magnetic field and the timing of the eruption was unexpected. Watched closely by the Sun-orbiting Solar Dynamics Observatory, the resulting explosion shot electrons and ions into the Solar System, some of which arrived at Earth three days later and impacted Earth’s magnetosphere, causing visible aurorae.

Loops of plasma surrounding an active region can be seen above the erupting filament in the ultraviolet image…

Thanks, Ursarodinia

NASA Iris satellite shows sun in amazing detail

The region located between the surface of the sun and its atmosphere has been revealed as a more violent place than previously understood, according to images and data from NASA’s newest solar observatory, the Interface Region Imaging Spectrograph, or IRIS.

Solar observatories look at the sun in layers. By capturing light emitted by atoms of different temperatures, they can focus in on different heights above the sun’s surface extending well out into the solar atmosphere, the corona. On June 27, 2013, IRIS, was launched, to study what’s known as the interface region – a layer between the sun’s surface and corona that previously was not well observed.

Over its first six months, IRIS has thrilled scientists with detailed images of the interface region, finding even more turbulence and complexity than expected. IRIS scientists presented the mission’s early observations at a press conference at the Fall American Geophysical Union meeting on Dec. 9, 2013.

The quality of images and spectra we are receiving from IRIS is amazing,” said Alan Title, IRIS principal investigator at Lockheed Martin in Palo Alto, Calif. “And we’re getting this kind of quality from a smaller, less expensive mission, which took only 44 months to build.”

Click through the link [above] and discover details, photos and a snazzy video. Enjoy!