The Aurora Australis on June 25, 2017, as seen from the International Space Station.NASA
First, the bad news for stargazers: Auroras are going dark in many parts of the world.
The number of these atmospheric light shows won’t bottom out for several years, which means locations far from Earth’s poles — such as the UK and northern continental US — may rarely if ever see the Northern Lights during that time. A study published earlier this year hints this dearth of auroras may last for decades.
(CNN)It’s a good idea to have a backup plan, especially in interstellar space.
NASA scientists needed to reorient the 40-year-old Voyager 1 — the space agency’s farthest spacecraft — so its antenna would point toward Earth, 13 billion miles away. But the “attitude control thrusters,” the first option to make the spacecraft turn in space, have been wearing out.
Using more than a half-century of observations, Japanese astronomers have discovered that the microwaves coming from the sun at the minimums of the past five solar cycles have been the same each time, despite large differences in the maximums of the cycles.
The National Oceanic and Atmospheric Administration’s Space Weather Prediction Center (SWPC) has issued a moderate (G2) geomagnetic storm watch for September 13. A coronal hole high-speed stream, originating from a recurrent, positive polarity coronal hole on the Sun’s surface, prompted the prediction. Minor (G1) geomagnetic storming is possible on September 14.
It’s been a turbulent time on the HF bands over the past several days. On Sunday, September 10, a strong (R3) radio blackout occurred at 1606 UTC. The source, Region 2673, has rotated just around the visible disk. Severe (G4) geomagnetic storm levels were observed at 2350 UTC on September 7, and again at 0151 UTC and 1304 UTC on September 8, due to the effects of a coronal mass ejection (CME).
This article was updated at 5:44 p.m. EDT to indicate that a coronal mass ejection was observed coming from the site of the solar flare.
Early this morning (Sept. 6), the sun released two powerful solar flares — the second was the most powerful in more than a decade.
At 5:10 a.m. EDT (0910 GMT), an X-class solar flare — the most powerful sun-storm category — blasted from a large sunspot on the sun’s surface. That flare was the strongest since 2015, at X2.2, but it was dwarfed just 3 hours later, at 8:02 a.m. EDT (1202 GMT), by an X9.3 flare, according to the National Oceanic and Atmospheric Administration’s Space Weather Prediction Center (SWPC). The last X9 flare occurred in 2006 (coming in at X9.0).
On Labor Day, the solar flux took a huge leap, from 120 to 183 from a day earlier. At 1300 UTC today, the solar flux was 144, and the sunspot number was 122. This bodes well for operation on the higher bands, with transequatorial propagation (TEP) a possibility on 12 and 10 meters as well as improved nighttime conditions on 20, 17, and 15 meters.
International Space Station (ISS) Expedition 52 Commander Fyodor Yurchikhin, RN3FI, and Flight Engineer Sergey Ryazanskiy manually deployed five nanosatellites during a spacewalk on August 17. Three of the satellites carry Amateur Radio payloads. Tanyusha-SWSU 1 and 2 (also known as also known as Radioskaf 6 and 7 — RS6S and RS7S) will transmit either 9.6 kB FSK or FM voice announcements on 437.050 MHz, while Tomsk-TPU-120 (RS4S) will transmit FM voice announcements on 437.025. The satellites were deployed from the Pirsairlock module of the ISS. Both have been reported active.
In commemoration of the 20th anniversary, the ARISS team is planning to transmit a set of 12 SSTV images that capture the accomplishments of ARISS over that time. While still to be scheduled, they anticipate the SSTV operation to occur around the weekend of July 15. This is now scheduled for Thursday, July 20 until Monday July 24 1800 UTC.
(I record the received audio and then later decode it using a program like MMSSTV)
(Phys.org)—A team of researchers with the Center of Planetary Science (CPS) has finally solved the mystery of the “Wow!” signal from 1977. It was a comet, they report, one that that was unknown at the time of the signal discovery. Lead researcher Antonio Paris describes their theory and how the team proved it in a paper published in the Journal of the Washington Academy of Sciences.
The AlSat-1N and Prathamsatellites, both carrying Amateur Radio payloads, have both been heard and identified following the India Space Research Organization (ISRO) PSLV-C35 mission launch on September 26. Reports are requested. Reports on AMSAT-BB indicate the Pratham CW beacon on 145.980 MHz is active.
The 3U AlSat-1N CubeSat was built in collaboration with the Algerian Space Agency, the UK Space Agency (UKSA), Surrey Space Centre (SSC) staff, and Algerian students as a technology transfer and demonstrator for Algeria.