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RTN<a href="https://chaos.social/tags/MPS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#MPS</a>: " Sonnenspäher Aditya-L1: Explosives Debüt im AllWenige Monate nach Inbetriebnahme hat die Raumsonde einen Strahlungsausbruch auf der Sonne beobachtet – und in eine kaum erforschte Schicht unseres Sterns geschaut. " <a href="https://www.mps.mpg.de/8324776/news_publication_24281363_transferred?c=2728" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.mps.mpg.de/8324776/news_publication_24281363_transferred?c=2728</a>28.2.2025<a href="https://chaos.social/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://chaos.social/tags/Flare" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Flare</a> <a href="https://chaos.social/tags/Indien" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Indien</a> <a href="https://chaos.social/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a> <a href="https://chaos.social/tags/Raumfahrt" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Raumfahrt</a> <a href="https://chaos.social/tags/Raumsonde" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Raumsonde</a> <a href="https://chaos.social/tags/SoLEXS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SoLEXS</a> <a href="https://chaos.social/tags/Sonne" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Sonne</a> <a href="https://chaos.social/tags/Sonnenatmosph%C3%A4re" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Sonnenatmosphäre</a> <a href="https://chaos.social/tags/Sonnensonde" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Sonnensonde</a> <a href="https://chaos.social/tags/SpaceFlight" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SpaceFlight</a> <a href="https://chaos.social/tags/SUIT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#SUIT</a> <a href="https://chaos.social/tags/UV" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#UV</a>

Scientific EuropeanSolar observatory spacecraft, Aditya-L1 inserted in Halo-Orbit  The solar observatory spacecraft, Aditya-L1 was successfully inserted in Halo-Orbit about 1.5 million km away from earth on 6th January 2024............ <a href="https://toot.community/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://toot.community/tags/Haloorbit" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Haloorbit</a> <a href="https://toot.community/tags/IndianSpaceResearchOrganisation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IndianSpaceResearchOrganisation</a> <a href="https://toot.community/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a> <a href="https://toot.community/tags/Lagrangianpoint" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Lagrangianpoint</a> <a href="https://toot.community/tags/Solarobservatory" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Solarobservatory</a> <a href="https://toot.community/tags/solarwind" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#solarwind</a> <a href="https://toot.community/tags/Spaceweather" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Spaceweather</a> SCIEU Team <a href="https://www.scientificeuropean.co.uk/sciences/space/solar-observatory-spacecraft-aditya-l1-inserted-in-halo-orbit/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.scientificeuropean.co.uk/sciences/space/solar-observatory-spacecraft-aditya-l1-inserted-in-halo-orbit/</a>

Glyn Moody<a href="https://mastodon.social/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://mastodon.social/tags/India" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#India</a>’s solar mission reaches Sun’s orbit - <a href="https://www.theguardian.com/world/2024/jan/06/aditya-l1-india-solar-mission-reaches-suns-orbit" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://www.theguardian.com/world/2024/jan/06/aditya-l1-india-solar-mission-reaches-suns-orbit</a> "reportedly cost $48m (£38m)" so why hasn't the UK done this? <a href="https://mastodon.social/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#space</a> <a href="https://mastodon.social/tags/astrophysics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#astrophysics</a>

AkaSci 🛰️After 4 orbit-raising maneuvers, the Aditya-L1 solar observatory has finally "slipped the surly bonds of Earth" and is now headed towards its destination, a halo orbit around the Sun-Earth Lagrange point L1. ETA - about 100 days from now.<a href="https://www.isro.gov.in/Aditya_L1.html" rel="nofollow noopener noreferrer" target="_blank">https://www.isro.gov.in/Aditya_L1.html</a> <a href="https://www.unoosa.org/documents/pdf/copuos/stsc/2022/11_INDIA_Item11_Indias_First_Solar_Mission_-_Aditya-L1.pdf" rel="nofollow noopener noreferrer" target="_blank">https://www.unoosa.org/documents/pdf/copuos/stsc/2022/11_INDIA_Item11_Indias_First_Solar_Mission_-_Aditya-L1.pdf</a> <a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://fosstodon.org/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a>

Revesdespace🛰️☀️ Pour <a href="https://universeodon.com/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a>, la quatrième manœuvre pour échapper à la Terre (EBN#4) a été réalisée avec succès. La nouvelle orbite atteinte est de 256 km x 121973 km. La prochaine manœuvre sera pour l’injection vers le point de Lagrange L1 et aura lieu le 19 septembre 2023

scinexx - das wissensmagazinIndien: Erst der Mond, jetzt die Sonne. Indisches Sonnenobservatorium Aditya-L1 erfolgreich gestartet. <a href="https://nrw.social/tags/Indien" class="mention hashtag" rel="tag">#Indien</a> <a href="https://nrw.social/tags/ISRO" class="mention hashtag" rel="tag">#ISRO</a> <a href="https://nrw.social/tags/AdityaL1" class="mention hashtag" rel="tag">#AdityaL1</a> <a href="https://nrw.social/tags/Sonnensonde" class="mention hashtag" rel="tag">#Sonnensonde</a> <a href="https://nrw.social/tags/Raumsonde" class="mention hashtag" rel="tag">#Raumsonde</a> <a href="https://nrw.social/tags/Sonnenobservatorium" class="mention hashtag" rel="tag">#Sonnenobservatorium</a> <a href="https://www.scinexx.de/news/kosmos/indien-erst-der-mond-jetzt-die-sonne/" target="_blank" rel="nofollow noopener noreferrer" translate="no">https://www.scinexx.de/news/kosmos/indien-erst-der-mond-jetzt-die-sonne/</a>

AkaSci 🛰️The other name we see mentioned often is Aditya-L1 project director Mrs. Nigar Shaji, who heads the project team at ISRO.<a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://fosstodon.org/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a> 4/n

AkaSci 🛰️The Lagrange points are named after pioneering mathematician, physicist and astronomer Joseph-Louis Lagrange (Jan 25, 1736 – Apr 10, 1813).Lagrange made significant contributions to the fields of analysis, number theory, and classical and celestial mechanics.His study of the 3-body problem and Lagrange points is described in this famous 1772 paper “Essai sur le Problème des Trois Corps.”<a href="https://en.wikipedia.org/wiki/Joseph-Louis_Lagrange" rel="nofollow noopener noreferrer" target="_blank">https://en.wikipedia.org/wiki/Joseph-Louis_Lagrange</a> <a href="https://cosweb1.fau.edu/~jmirelesjames/StromgrenTranslation.pdf" rel="nofollow noopener noreferrer" target="_blank">https://cosweb1.fau.edu/~jmirelesjames/StromgrenTranslation.pdf</a> <a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://fosstodon.org/tags/Lagrange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Lagrange</a> 8/n

AkaSci 🛰️Objects cannot be placed exactly at L1 as they will drift off after any minor deviations. Hence, they are stationed in orbits around the L1 point, which are more stable, but still require periodic (monthly) small adjustments.The math to compute Halo/Lissajous orbits is much more complex.Similar calculations/constraints apply to the L2 Lagrange point.The graphic below shows the exotic orbits around L2 of a few space telescopes.<a href="https://en.wikipedia.org/wiki/Halo_orbit" rel="nofollow noopener noreferrer" target="_blank">https://en.wikipedia.org/wiki/Halo_orbit</a> <a href="https://www.esa.int/ESA_Multimedia/Videos/2023/07/Webb_and_Gaia_welcome_Euclid_to_L2" rel="nofollow noopener noreferrer" target="_blank">https://www.esa.int/ESA_Multimedia/Videos/2023/07/Webb_and_Gaia_welcome_Euclid_to_L2</a> <a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> 7/n

AkaSci 🛰️Hence, we get G * Ms * m / (R - r)^2 = G * Me * m / r^2 + m * ω^2 * (R - r)Simplifying, we get G * Ms / (R - r)^2 - G * Me / r^2 - ω^2 * (R - r) = 0One can solve for r iteratively using a spreadsheet or a simple computer program.Plugging in – G = 6.674E-20 km^3 / kg / s^2 Ms = 1.989E+30 kg Me = 5.9722E+24 kg R = 149,597,870 km ω = 2 * pi / (365.25 * 24 * 3600) radians/sec (that of earth)We get r = 1,487,940 km, which is close to the 1,500,000 km value commonly cited.<a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> 6/n

AkaSci 🛰️Here is a simple approx. method to compute the distance between L1 and Earth.Let’s assume circular orbits.At L1, the centrifugal force due the object's orbital motion must balance out the gravitational forces of Earth and the Sun. i.e., Fsun = Fearth + FcUsing the notations from the diagram, we have Fsun = G * Ms * m / (R - r)^2 (Newton’s equation, G is the Gravitational constant) Fearth = G * Me * m / r^2 Fc = m * ω^2 * (R - r) (ω (omega) is the angular speed in radians/s)<a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> 5/n

AkaSci 🛰️How can an object at L1 orbit around the Sun at the same period as Earth (365.25 days)?It is well-known that objects closer to the sun have a smaller period. E.g., Venus has an orbital period of 225 days and Mercury 88 days.But at L1, the object is under the influence of gravity from both the Sun and the Earth. The net gravitational force towards the Sun is smaller and hence the object can orbit at a lower angular speed and a lower centrifugal force.<a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://fosstodon.org/tags/LagrangeL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#LagrangeL1</a> 4/n

:fckafd: Olli Graf🚟Go India go!<a href="https://nrw.social/tags/adityal1" class="mention hashtag" rel="tag">#adityal1</a> Indischer Forschungssatellit unterwegs zur Sonne | heise online <a href="https://www.heise.de/news/Aditya-L1-Indischer-Forschungssatellit-unterwegs-zur-Sonne-9293186.html" target="_blank" rel="nofollow noopener noreferrer" translate="no">https://www.heise.de/news/Aditya-L1-Indischer-Forschungssatellit-unterwegs-zur-Sonne-9293186.html</a>

AkaSci 🛰️Article by Dibyendu Nandi on the Aditya-L1 mission. <a href="https://www.nature.com/articles/d44151-023-00127-8" rel="nofollow noopener noreferrer" target="_blank">https://www.nature.com/articles/d44151-023-00127-8</a><a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://fosstodon.org/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a> 3/n

AkaSci 🛰️Nice pic of Annapurni Subramaniam (4th from right in red saree) and other scientists associated with the Aditya-L1 mission.Posted by physicist and astronomer Dibyendu Nandi (4th from left) on twitter at <a href="https://twitter.com/ydnad0" rel="nofollow noopener noreferrer" target="_blank">https://twitter.com/ydnad0</a> <a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://fosstodon.org/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a> 2/n

AkaSci 🛰️An insightful perspective on the Aditya-L1 mission written by Annapurni Subramaniam, Astrophysicist and Director of the Indian Institute of Astrophysics, Bengaluru. Image below is from her twitter site. <a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://fosstodon.org/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a> 1/n

AkaSci 🛰️This is what Earth looks like from the Sun-Earth L1 Lagrange point, as seen by the NOAA DSCOVR satellite.The Deep Space Climate Observatory (DSCOVR) satellite observes both the Sun and the Earth. It also acts as an early warning system for solar magnetic storms.Daily images at <a href="https://epic.gsfc.nasa.gov/?date=2023-08-30" rel="nofollow noopener noreferrer" target="_blank">https://epic.gsfc.nasa.gov/?date=2023-08-30</a> <a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://fosstodon.org/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a> <a href="https://fosstodon.org/tags/DSCOVR" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DSCOVR</a> 3/n

AkaSci 🛰️Aditya-L1 will join a number of other solar observatories stationed in Halo or Lissajous orbits around L1 such as SOHO, DSCOVR and ACE.Similar orbits around the Sun-Earth L2 point are used by space telescopes such as JWST, Gaia and Euclid.More on L1 and halo orbits in the thread below.<a href="https://en.wikipedia.org/wiki/List_of_objects_at_Lagrange_points" rel="nofollow noopener noreferrer" target="_blank">https://en.wikipedia.org/wiki/List_of_objects_at_Lagrange_points</a> <a href="https://en.wikipedia.org/wiki/Lagrange_point#L2" rel="nofollow noopener noreferrer" target="_blank">https://en.wikipedia.org/wiki/Lagrange_point#L2</a> <a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://fosstodon.org/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a> 2/n

AkaSci 🛰️India successfully launched its first-ever solar observatory Aditya-L1 earlier today.Aditya = Sun in Sanskrit L1 = Sun-Earth L1 Lagrange PointAfter a few orbit-raising maneuvers and a maneuver to leave Earth's Sphere of Influence, Aditya-L1 will be inserted into the orbit around L1 ~109 days from now.Aditya-L1 will be stationed in a Halo orbit around the L1 point, from where it will get an unobstructed view of the Sun.<a href="https://www.isro.gov.in/Aditya_L1.html" rel="nofollow noopener noreferrer" target="_blank">https://www.isro.gov.in/Aditya_L1.html</a> <a href="https://www.unoosa.org/documents/pdf/copuos/stsc/2022/11_INDIA_Item11_Indias_First_Solar_Mission_-_Aditya-L1.pdf" rel="nofollow noopener noreferrer" target="_blank">https://www.unoosa.org/documents/pdf/copuos/stsc/2022/11_INDIA_Item11_Indias_First_Solar_Mission_-_Aditya-L1.pdf</a> <a href="https://fosstodon.org/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> <a href="https://fosstodon.org/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a> 1/n

Spaceflight 🚀🇮🇳 <a href="https://techhub.social/tags/ISRO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ISRO</a>'s <a href="https://techhub.social/tags/AdityaL1" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#AdityaL1</a> launched 🚀 aboard <a href="https://techhub.social/tags/PSLV" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PSLV</a> from <a href="https://techhub.social/tags/Sriharikota" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Sriharikota</a>, is meanwhile heading for its destination at <a href="https://techhub.social/tags/Lagrange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Lagrange</a> point 1 to study the sun ☀️ <a href="https://www.youtube.com/watch?v=1Hvs_fA2f7c" rel="nofollow noopener noreferrer" target="_blank">https://www.youtube.com/watch?v=1Hvs_fA2f7c</a>

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