Opening remarks were delivered by Jochen Flasbarth, State Secretary at the German Federal Ministry for the Environment, Climate Action, Nature Conservation & Nuclear Safety.
He highlighted the urgency of Africa’s restoration agenda for climate resilience.
#ACS3 #Trees4Resilience
The image shows a starry sky with some veil clouds and contrails, all lit up by the Full Moon (outside of the image at left). At lower right planet Jupiter is visible, at centre right the Pleiades or Seven Sisters star cluster. Above centre two short trails are visible. The brightest and upper one is the Advanced Composite Solar Sail Satellite. The lower one is the Chinese Yaogan 1 satellite.
The #ACS3 #SolarSail satellite this evening during a high pass through ENE. It was flaring with the same frequency as it does for quite a while now. Below ACS3 Chinese satellite Yaogan 1 can be seen. Very unfavourable sky with Full Moon and a lot of contrails. Image taken at 18:54 CET (UT+1).
First of three images showing a rather cloudy sky with enough gaps to see stars and a short trail varying in brightness. This is the Advanced Composite Solar Sail System (ACS3) satellite from NASA. In the first and third image the satellite varies in brightness during the 8 second exposure time of the images. In the second image its brightness remains stable at its maximum shown during the pass.
Pretty bright high eastern pass of NASA's #ACS3 #SolarSail this evening 3 December 2024. Images taken from 18:14 to 18:16 UT. Exposure times 8 seconds. It was flaring less regular than it used to do in the past two months. @annqld1.bsky.social @leonoor.bsky.social @sjbastro.bsky.social
The image shows the international space station as a bright streak in a sky full of stars, veil clouds and light pollution near the horizon. The streak is caused by the shuttertime of 5 seconds for the image. Most of the veil clouds are remnants of aircraft contrails. High air humidity strengthens the light pollution.
The image shows a sky full of stars with constellation Perseus in centre, above some trees. In the centre of the image a short streak varying in brightness is visible. This is the tumbling Solar Sail satellite ACS3 launched by NASA in april of this year.
Low but nice pass of space station #ISS tonight at 17:35 UT. Lots of contrail remnants in the sky. Around 18:06 UT an easterly pass of NASA's Solar Sail satellite #ACS3. It was flaring brightly (shutter time of this image 6 s). @daveatcogs.bsky.social @sjbastro.bsky.social @suerob7.bsky.social
Image shows a night view of the tower of Lebuinus church in Deventer, with planet Venus at right shing through a tree. At far left in the dark sky a star is visible - star sigma in constellation Sagittarius.
The image shows a streak in a dark sky, starting bright and fading. This is space station ISS entering the earth's shadow.
The image shows two blue streaks in a dark sky. These are clusters of Starlink satellites launched the day before.
Unexpectedly the sky cleared tonight. So here are planet #Venus (at right in 1st pic), space station #ISS entering the Earth's shadow at 18:36 CET, and Starlink #G9-12, launched yesterday. I did also observe NASA's #ACS3 #SolarSail, but camera failed. @leonoor.bsky.social @daveatcogs.bsky.social
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Very rapid brightness fluctuations of NASA
's Solar Sail #ACS3 yesterday evening.
Framestacks plus brightness curve
curve with range-corrected brightness data
curve with fitted sinusoidal (multiplicities of 11.515 seconds)
Yesterday evening (21 Sept), NASA's #ACS3 solar sail showed a very rapid brightness variation with a complex periodicity of (multitudes of) 11.515 seconds.
Curve below is range-corrected brightness (normalized to 1000 km).
⏰ vend. 13/09 : session de rattrapage pour observer la voile solaire #ACS3 depuis #Perpignan. Elle arrivera depuis le sud, apparition à 22h09. Elle culminera presque au zénith à 22h13, c’est là qu’elle flashe intensément pendant 4 à 5 secondes. À voir !
The bright white line of the ACS3 passing through the starfield of the Summer Triangle asterism. This is an image made up of 7 different shots. The small gaps are when the camera was saving each picture. The ACS3 started off bright near Altair at the bottom and then faded from view as it passed through Cygnus. It then became visible again near Lyra before fading again.
Another shot of NASA's Advanced Composite Solar Sail System (ACS3) from last night - a wider view of it passing through the Summer Triangle. This is pretty much how it looked to the naked eye. It faded from view crossing Cygnus before appearing again. #ACS3 #Astronomy #Astrophotography #Space
The white line passing through the star field near bright Vega (bottom right) is the track of NASA's ACS3 Solar Sail satellite.
I captured NASA's Advanced Composite Solar Sail System (ACS3) passing next to Vega this evening, at 20:20 UT from North Yorkshire. It faded in and out of view a couple of times but when it was visible it was quite bright. #ACS3 #Astronomy #Astrophotography #Space
Just was able to observe a Solar sail craft, My first!
#NASA #ACS3 (Advanced Composite Solar Sail System)
Despite high clouds it was an apparent 4th magnitude from LaCrosse Wisconsin
#astro #space 🔭
Just like the wind guides a sailboat on water, it only takes a slight amount of sunlight to guide solar sails through space. Though photons don't have mass, they can force momentum when they hit an object
#NASA #space #science #SolarSail #ACS3
展開型先進複合ソーラーセイルシステムの実証を目的とした #NASA の超小型衛星" #ACS3 "(Advanced Composite Solar Sail System)に搭載された広角オンボードカメラからの画像が公開されています.🛰✨
展開されたソーラーセイルが綺麗に輝いています.
この輝きは地上からも観測出来るそうです.
NASA Evaluates Deployed Advanced Composite Solar Sail System – Small Satellite Missions
blogs.nasa.gov/smallsatelli...
NASA's #solar sail #ACS3 was supposed to pass through the keystone in Hercules, but it must have missed. @nebulousnikki.bsky.social and I saw it briefly, but it disappeared, and we didn't see it again. Didn't see it on the first pass... We did see a nice bright meteor though. Got M13 #astronomy
Una nave espacial de la NASA que recientemente desplegó una vela solar de vanguardia está «girando y tambaleándose» mientras orbita nuestro planeta, según muestran observaciones. #orbita #velasolar #acs3 #nasa mysteryplanet.com.ar/site/nuevo-v...
“The Advanced Composite Solar Sail System ( #ACS3) mission aims to test the efficacy of a new type of #solarsail — a device potentially capable of propelling #spaceships to faster-than-currently-available speeds using #radiation pressure exerted by #sunlight” www.livescience.com/space/space-...
Just watched #ACS3 tumble by. Looked like it was visible for 15-20 seconds, and then disappeared for 15-20 seconds. Brightest near the zenith. #astronomy
Plot of apogee and perigee altitude, showoing sudden change after August 30.4 UTC
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There is a sudden change in the orbital eccentricity (and with that apogee and perigee heights) of #ACS3 starting on August 30.4 UTC. Perhaps related.
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Video footage of parts of yesterday evening's pass of the #ACS3 Solar Sail. Clear variability with multiple bright peaks and faint lows.
(NB: footage is not a continuous sequence)
vimeo.com/1005433406
diagram of brightness variation over time
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This is a very fragmentary brightness curve. NOTE: peaks are saturated, and during some lows it was invisible. Lost track of it a couple of times. But very clear there is a significant brightness variation #ACS3 #solarsail
fantechno.com/nasas-solar-...
NASA’s Solar Sail Successfully Unfurls in Space
#ACS3 #Exploration #NASA #RocketLab #SolarSail #Space
image showing the trail of ACS 3 amidst the stars above part of the roof of the author's house in Leiden.
I observed @NASA 's #ACS3 #Solarsail pass over Leiden, the Netherlands at 20:26 UTC (29 Aug).
It was not particularly bright (briefly mag +3, most of the time much fainter). Canon EOS 80D + 1.4/35 mm lens at F2.0, 5 seconds ISO 800.
@spacedot_com Rocket 🚀 Lab #RocketLat launches new NASA solar sail #SolarSail tech to orbit :
The #NASA Advanced Composite Solar Sail System, or #ACS3 for short, was one of two payloads that lifted off atop a Rocket Lab Electron vehicle from New Zealand
➡️ www.space.com/rocket-lab-n...
And not 10 minutes later, a #Rocketlab #Electron launched the earth obs #NEONSAT1 for #KAIST (S. Korea) & #ACS3, a solar sail test for #NASA, from #Mahia to SSO. Beautiful weather, beautiful views. I just love spaceflight!
Launch of Rocket Lab #Electron rocket with #NeonSat1 & NASA's #ACS3 solar sail imminent. Watch live! #BeginningOfTheSwarm
