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ISRO will perform the final manoeuvre on Saturday to inject Aditya-L1 spacecraft — the first space-based Indian observatory to study the Sun — into its final destination orbit, some 1.5 million kilometres from the Earth. According to ISRO officials, the spacecraft will be placed in a halo orbit around Lagrange point 1 (L1) of the Sun-Earth system, about 1.5 million km from the Earth. The L1 point is about one per cent of the total distance between the Earth and the Sun.

A satellite in a halo orbit around the L1 point has the major advantage of continuously viewing the Sun without any occultations/eclipses, they said, adding, this will provide a greater advantage in observing solar activities and its effect on space weather in real time.

“This manoeuvre (at around 4pm on Saturday) will bind the Aditya-L1 to a halo orbit around L1. If we don’t do this, there is a possibility that it will continue its journey, maybe towards the Sun,” an ISRO official told PTI on Friday.

The Polar Satellite Launch Vehicle (PSLV-C57) launched the Aditya-L1 spacecraft from the second launch pad of Satish Dhawan Space Centre (SDSC), Sriharikota, on September 2 last year.

After a flight duration of 63 minutes and 20 seconds, it was successfully injected into an elliptical orbit of 235×19500 km around the Earth.

The spacecraft underwent a series of manoeuvres thereafter and headed Sun-Earth Lagrange Point 1(L1), having escaped the Earth’s sphere of influence.

The spacecraft carries seven payloads to observe the photosphere, chromosphere and the outermost layers of the Sun (the corona) using electromagnetic and particle and magnetic field detectors.

“Using the special vantage point L1, four payloads directly view the Sun and the remaining three payloads carry out in-situ studies of particles and fields at the Lagrange point L1, thus providing important scientific studies of the propagatory effect of solar dynamics in the interplanetary medium,” according to the space agency.

The suits of Aditya L1 payloads are expected to provide the “most crucial information” to understand the problem of coronal heating, coronal mass ejection, pre-flare and flare activities and their characteristics, dynamics of space weather, and propagation of particles and fields, officials said.

The major science objectives of the Aditya-L1 mission are:

  • Study of the Solar upper atmospheric (chromosphere and corona) dynamics.
  • Study of chromosphere and coronal heating, physics of the partially ionized plasma, initiation of the coronal mass ejections, and flares.
  • Observe the in-situ particle and plasma environment, providing data for the study of particle dynamics from the Sun.
  • Physics of the solar corona and its heating mechanism.
  • Diagnostics of the coronal and coronal loops plasma: Temperature, velocity and density.
  • Development, dynamics and origin of coronal mass ejections (CMEs).
  • Identify the sequence of processes that occur at multiple layers (chromosphere, base and extended corona) which eventually leads to solar eruptive events.
  • Magnetic field topology and magnetic field measurements in the solar corona.
  • Drivers for space weather (origin, composition and dynamics of solar wind).
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Russian Kosmos Satellites Release Mysterious Object in Orbit

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April 7, 2025

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Russian Kosmos Satellites Release Mysterious Object in Orbit

A group of Russian satellites launched earlier this year has caught the attention of space watchers around the world. The satellites – Kosmos 2581, 2582, and 2583 – were sent into orbit in early February from the Plesetsk Cosmodrome. They’ve been placed in a near-polar orbit, about 585 kilometres above Earth. So far, Russian officials haven’t confirmed what these satellites are actually meant to do. But what’s really stirred interest is the release of an unknown object from one of them. This new development, spotted in mid-March, has prompted fresh scrutiny from space monitoring teams across the globe.

What We Know So Far

According to tracking data from the United States Space Force and other monitoring groups, the mysterious object appeared on March 18. It was quickly catalogued and, at first, linked to Kosmos 2581. Later on, though, some signals hinted it might be tied to Kosmos 2583 instead. What’s clear is that the object was released while the satellites were still active – and so far, Russia hasn’t said a word about it.

Interestingly, before the object showed up, the satellites were seen carrying out what’s known as “proximity operations” – basically manoeuvring close to other objects in orbit, which is not something routine satellites typically do.

Expert Insight and Possible Explanations

Astrophysicist Jonathan McDowell from the Harvard-Smithsonian Center for Astrophysics spoke to Space.com about the situation. He pointed out that the satellites had been making deliberate close-range movements, which has led many to believe this isn’t just routine activity.

As for the object itself, there are a few possibilities. It could be part of a satellite testing programme or a tool for formation flying. There’s also a chance it’s linked to some kind of military experiment. While a technical malfunction hasn’t been ruled out, experts note that accidents like that usually leave behind several bits of debris – and that doesn’t seem to be the case here.

Putting It Into Context

The “Kosmos” label has been used by Russia for decades, dating back to 1962. It covers a broad range of secretive military and scientific missions. Triplets like this group aren’t unusual either – China and the US have also used similar formations, often for surveillance or intelligence-gathering purposes.
Still, the exact purpose of Kosmos 2581, 2582, 2583 – and now this newly released object – remains a mystery. Until more information is released (if it ever is), analysts will continue to watch closely from the ground.

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NASA’s Parker Solar Probe Completes Second Close Flyby of the Sun

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April 7, 2025

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NASA’s Parker Solar Probe Completes Second Close Flyby of the Sun

NASA’s Parker Solar Probe has made its second close flyby of the sun. The spacecraft travelled at a speed of 692000 kilometres per hour. It moved within 6.1 million kilometres of the sun. This event took place on March 22. A signal confirming its good health was received on March 25. The signal confirmed that all systems on board were working as planned. The probe was designed to study solar winds and collect data from the sun’s outer atmosphere. The mission is being used to help scientists understand solar activity that affects Earth.

More About The Mission

According to NASA’s announcement, the probe’s instruments were activated during the pass. They were used to study the corona. This is the outer layer of the sun’s atmosphere. The spacecraft was operated on its own during the flyby. It had been programmed in advance. Scientists believe this data may help them understand why the corona is hotter than the sun’s surface. The data is also being used to study changes in space weather. This information is considered important for protecting satellites and communication systems on Earth.

Quote from NASA

In a press release issued by NASA, acting Administrator Janet Petro said that the mission has entered a zone no spacecraft has visited before. Petro said this while addressing the media at the agency’s Washington headquarters. She said that the research is expected to change how solar science is studied in the future.

Award given to the team

As per a statement released by the National Aeronautic Association, the mission team was given the 2024 Robert J. Collier Trophy. The team includes experts from NASA and Johns Hopkins Applied Physics Laboratory. Ralph Semmel, Director at Johns Hopkins APL, said that the mission was once believed to be impossible. He shared this in an interview with NASA’s press team. The next close flyby is expected to take place on June 19.

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ISRO’s Shubhanshu Shukla Set to Make History with Space Station Mission in May

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ISRO’s Shubhanshu Shukla Set to Make History with Space Station Mission in May

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April 7, 2025

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ISRO’s Shubhanshu Shukla Set to Make History with Space Station Mission in May

The mission of Indian astronaut Group Captain Shubhanshu Shukla to the International Space Station (ISS) will take place in May 2025. This mission will be the greatest research and science-related activity carried out on an Axiom Space voyage onboard the International Space Station to date, emphasizing the mission’s global relevance and collaborative character in advancing microgravity research in low-Earth orbit (LEO). NASA confirmed from its Kennedy Space Center in Florida, United States, that the mission will launch no earlier than May 2025.

Mission Overview and Crew

Shubhanshu Shukla will join an international crew on a commercial spacecraft; he is a skilled aerospace engineer and one of ISRO’s top astronaut prospects. This mission is viewed as a watershed moment in India’s larger journey toward advanced space exploration and human spaceflight.

ISRO’s research studies will focus on investigating the physical and cognitive impact of computer screens in microgravity and studying the growth, metabolism, and genetics of three microalgae strains in microgravity.

Scientific Objectives and Experiments

The ISRO-led study, in collaboration with NASA and ESSA, aims to increase microgravity research aboard the ISS to better our understanding of biological processes in microgravity and develop strategies for long-term space missions.

India’s Expanding Role in Space

Indian astronaut Group Captain Shubhanshu Shukla will be the first Indian astronaut to visit the International Space Station and the first Indian to travel to space in the past 40 years.The commercial mission will be directed by experienced NASA astronaut Peggy Whitson, with Tibor Kapu from Hungary and European Space Agency project astronaut Sławosz Uznański-Wiśniewski from Poland.

Mission Duration and Recovery

Following the launch from Kennedy Space Center, the mission crew will spend 14 days on board the International Space Station, completing several experiments.

According to Axiom Space, the Ax-4 research complement includes over 60 scientific programs and activities from 31 nations, including the United States, India, Poland, Hungary, Saudi Arabia, Brazil, Nigeria, the UAE, and countries throughout Europe.

After achieving their objectives, the spacecraft will return to Earth, with a splashdown scheduled in the Pacific Ocean. NASA and its allies will oversee recovery efforts to ensure the safe return of all crew members.

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