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Chandrayaan-3’s Vikram lander is set to undergo a crucial deboosting manoeuvre on Friday after successfully getting separated from the propulsion module a day before. The deboosting manoeuvre is scheduled today at around 1600 IST. Deboosting is the process of slowing down to position itself in an orbit where the orbit’s closest point to the Moon (Perilune) is 30 km and the farthest point (the Apolune) is 100 km.

“The next Lander Module (Deorbit 1) manoeuvre is scheduled for tomorrow (August 18, 2023) around 1600 hrs IST,” ISRO posted on X (formerly Twitter) yesterday while announcing the successful separation of the lander from the propulsion module.

The Chandrayaan-3 mission’s lander is named after Vikram Sarabhai (1919–1971), who is widely regarded as the father of the Indian space programme. On Wednesday, the spacecraft carried out the final lunar-bound orbit reduction manoeuvre of the Chandrayaan-3 spacecraft, a week ahead of its scheduled landing on the south pole of the moon on August 23.

A GSLV Mark 3 (LVM 3) heavy-lift launch vehicle was used for the launch of the spacecraft that was placed in the lunar orbit on August 5 and since then it has been through a series of orbital manoeuvres.

It has been a month and three days since the Indian Space Research Organisation launched the Chandrayaan-3 mission on July 14. The spacecraft was launched from the Satish Dhawan Space Centre in Andhra Pradesh’s Sriharikota. ISRO is bidding to make a successful soft landing on the moon, which will make India the fourth country in the world to achieve the feat after the United States, Russia, and China.

The stated objectives of Chandrayaan-3, India’s third lunar mission, are safe and soft landing, rover roving on the moon’s surface, and in-situ scientific experiments.

The approved cost of Chandrayaan-3 is Rs. 250 crores (excluding launch vehicle cost).
Chandrayaan-3’s development phase commenced in January 2020 with the launch planned sometime in 2021. However, the COVID-19 pandemic brought an unforeseen delay to the mission’s progress.

Chandrayaan-3 is the ISRO’s follow-up attempt after the Chandrayaan-2 mission faced challenges during its soft landing on the lunar surface in 2019 and was eventually deemed to have failed its core mission objectives.
The key scientific outcomes from Chandrayaan-2 include the first-ever global map for lunar sodium, enhancing knowledge on crater size distribution, unambiguous detection of lunar surface water ice with IIRS instrument and more.

During the Chandrayaan-1 mission, the satellite made more than 3,400 orbits around the moon and the mission was concluded when the communication with the spacecraft was lost on August 29, 2009, according to the Indian Space Research Organisation (ISRO).

Meanwhile, the Chairman of the Indian Space Research Organisation (ISRO), S Somanath last week expressed confidence in the progress of the Chandrayaan 3, providing reassurance that all systems were operating as planned. Chairman S Somanath stated, “Everything is going fine now. There will be a series of manoeuvres until it lands (on the Moon) on 23rd August. The satellite is healthy.”

Moon serves as a repository of the Earth’s past and a successful lunar mission by India will help enhance life on Earth while also enabling it to explore the rest of the solar system and beyond.

Historically, spacecraft missions to the Moon have primarily targeted the equatorial region due to its favourable terrain and operating conditions. However, the lunar south pole presents a vastly different and more challenging terrain compared to the equatorial region. 

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Iran’s Folded Rocks Reveal Ancient Tectonic Power at Asia-Europe Boundary

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April 21, 2025

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Iran’s Folded Rocks Reveal Ancient Tectonic Power at Asia-Europe Boundary

The deformed rocks of Iran are formed due to strong mountain ridges and valleys in the Greater Caucasus mountain range, southwest of the Caspian Sea. Between 10 million and 50 million years ago, its growth was marked by sedimentary layers crushed during the first impact between the Arabian and Eurasian tectonic plates. The vividly coloured rocks produced by the sedimentary layers gathered over millennia range in tone from terracotta to greenish to bluish. Using satellite pictures, NASA’s Jet Propulsion Laboratory and Earth Observatory have shown how the landscape tended to cluster over time.

One image depicts the different strata layers, vegetation, and the Zanjan-Tabriz freeway linking Tehran and Poznan. Interestingly, another image is of the Qezel Ozan River, which provides agricultural water in the region. The region is still converging, and fresh research suggests that a slab of oceanic crust is being shredded beneath Iraq and Iran.

Iran’s Folded Rocks Expose Arabia-Eurasia Tectonic Collision

According to reported NASA experts, a tectonic clash between the continents — known as Eurasia and Arabia — crunched these vividly hued strata of rock into massive folds. Located southwest of the Caspian Sea, Iran’s folded rocks are mountain ridges and valleys from the Greater Caucasus mountain chain. The disrupted rocks are made of sedimentary layers that were tilted and folded after the first collision between the Arabian and Eurasian tectonic plates, which is estimated to have occurred 10 to 50 million years ago.

Under Iraq and Iran, some of the oceanic crust between the Arabian and Eurasian plates is breaking apart, according to current research, which results in an anomalous silt accumulation at the surface. The complexity of the Earth’s surface and the Qezel Ozan River, combined with the Neotethys oceanic plate pulling the area down, account for this.

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Astronomers Discover Potential ‘Dark Galaxy’ Near the Milky Way

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Astronomers Discover Potential ‘Dark Galaxy’ Near the Milky Way

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23 hours ago

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April 21, 2025

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Astronomers Discover Potential ‘Dark Galaxy’ Near the Milky Way

Astronomers might have discovered a dark galaxy, primarily made up of dark matter, in the local universe. Dark galaxies are theoretical starless systems that could provide valuable insight for galaxy formation models. The candidate was in a massive, rapidly moving gas cloud, first discovered in the 1960s. At high resolution, the methyl formate cloud appeared to be a tight knot of gas, potentially forming a dark galaxy. But not all astronomers are convinced. It’s more likely to be a regular gas cloud at the edge of the Milky Way, says the astronomer Tobias Westmeier.

The study was published in Science Adviser. It reveals that since the early 2000s, a few possible dark galaxies have been discovered close to the Milky Way. However, multiple studies have suggested that these alleged dark galaxies were misclassified. The study further highlights that the hypothetical dark galaxy evolved this way after a collision with cosmic gas close to our galaxy. Finding dark galaxies could enable better computer simulations and provide fresh insight into galaxy development.

Astronomers Discover Dark Galaxy Candidate Near Milky Way

According to the report, a hypothetical dark galaxy was revealed amid the field of dark matter in the early eras of the history of the universe. Better knowledge of the development of black galaxies, systems devoid of stars, is what astronomers aim for. First spotted half a century ago, a massive, fast-moving gas cloud showed new promise when scientists detected it. High-resolution cloud observations revealed a tiny gas cluster possibly matching a dark galaxy. Jin-Long Xu from the Chinese Academy of Sciences in Beijing told Science News that the finding marks the first of a potential black galaxy in the nearby universe.

Still, not all scientists agree with the dark galaxy designation of the clump. The report further notes that Westmeier thinks the object is most likely a regular gas cloud at the Milky Way’s edge. The idea dates back to identifying some purported black galaxies in orbit as far back as the early 2000s.

The latest discoveries came from observations with three radio telescopes, including high-resolution photos from the Five-Hundred-meter Aperture Spherical Telescope (FAST) in southern China. In much of the cluster, the scientists shadowed the velocity and direction of hydrogen gas and then deduced distance, which they found to be 900,000 light-years from Earth.

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NASA Scientists Study Crystal Formation in Space For Future Applications

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3 days ago

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April 19, 2025

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NASA Scientists Study Crystal Formation in Space For Future Applications

NASA scientists have been studying crystals to optimise the process of crystallisation for decades. Various researchers have conducted research on crystals within the first quarter of the year, the latest being protein crystallisation in microgravity. Alexandra Ros from Arizona State University led the research by launching a protein crystallisation test in the International Space Station (ISS). The experiments are meant to determine the growth of protein crystals in space using newly developed microfluid devices. The research agenda is to examine whether space-grown crystals can achieve better quality than those formed on Earth.

What is Crystallisation, & How Does It Impact Our Lives?

It is the process of freezing of liquid or molten materials in the form of highly organised molecules called crystals. These crystals can be a blend of different types of materials. This world consists of crystal examples everywhere. It would be wrong to say that we don’t live in a world of crystals.

Be it a coffee mug, cellphone or silicon that is used to form the brains of electronics and used in memory chips, everything is a result of crystallisation. Other types of semiconductor crystals are used as detectors for different radiations, such as gamma rays, infrared rays, etc. Lasers used in scanning the product are made of optical crystals. Turbine blades are an example of metal crystals used in the jet engine.

Why and How NASA Studies Crystals?

The scientists studied the growth of zinc selenide crystals in space, with the crystals on Earth, explained NASA. The result from the observations marked the way for the improvement of the operations of infrared wavelength in the high powered lasers. The research findings provide an insight into the strong influence of gravity on the electrical, optical and structural characteristics of the crystals.

Researchers have optimised the crystal usage for several years to study the types of crystals for growing in space.

The crystals grown on Earth have defects such as little cracks; these cracks can damage the properties of the crystals. This marks a strong reason why scientists want to study crystals in space, thus getting a complete microgravitational environment where they can grow better. Convection produced due to the presence of the gravitational force degrades the quality of crystals.

However, this convection is not seen in the environment of microgravity, helping in the better quality crystals. The ISS is now converted to a complete lab for the study of the formation of crystals, which can be further applied in technology and medicine.

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