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Indian Space Research Organisation (ISRO) Chairman S Somnath on Monday said that the Chandrayaan-3- the third edition of India’s mission to the moon- will be launched this July.

Chandrayaan-3 is a follow-on mission to Chandrayaan-2 to demonstrate end-to-end capability in safe landing and roving on the lunar surface.

“I am very confident…” said Somnath today on the lunar mission.

The ISRO chairman was speaking after the space agency successfully placed the NVS-01, the first of the second-generation satellite series, into geosynchronous transfer orbit. The Geosynchronous Satellite Launch Vehicle deployed the NVS-01 navigation satellite from the second launch pad at the Satish Dhawan Space Centre (SDC SHAR) in Sriharikota in Andhra Pradesh.

Speaking to ANI, Somanath said, “The lesson is very simple. Learn from the past, and do what is possible with your capacity. Failures may happen. There are a thousand reasons for a rocket to fail. Even today, this mission could have failed. But we have to do what is needed to be done”.

Meanwhile, the Chandraayan-3 mission consists of an indigenous lander module a propulsion module and a rover with an objective of developing and demonstrating new technologies required for Inter planetary missions.

According to ISRO, the three mission objectives of the Chandrayaan-3 are- to demonstrate safe and soft landing on lunar Surface; to demonstrate Rover roving on the moon and to conduct in-situ scientific experiments.

It will be launched by the LVM3 rocket from SDSC SHAR centre in Sriharikota. The propulsion module will carry the lander and rover configuration till 100 km lunar orbit, according to ISRO.

The propulsion module has Spectro-polarimetry of Habitable Planet Earth (SHAPE) payload to study the spectral and Polari metric measurements of Earth from the lunar orbit.

The Lander will have the capability to soft land at a specified lunar site and deploy the Rover which will carry out in-situ chemical analysis of the lunar surface during the course of its mobility. The Lander and the Rover have scientific payloads to carry out experiments on the lunar surface.

The main function of the Propulsion Module is to carry the Lander Module from launch vehicle injection till final lunar 100 km circular polar orbit and separate the Lander Module from the Propulsion Module.

Apart from this, the Propulsion Module also has one scientific payload as a value addition which will be operated post separation of Lander Module.

The launcher identified for Chandrayaan-3 is GSLV-Mk3 which will place the integrated module in an Elliptic Parking Orbit (EPO) of size 170 x 36500 km.

The Chandrayaan is an ongoing series of lunar space exploration programme of the ISRO. Chandrayaan-1, the first lunar probe of ISRO, in 2008-09 found water on the moon. The Chandrayaan-2 was launched in July 2019 and successfully inserted into orbit in August 2019. However, minutes its lander crash-landed on the moon after losing communication with the ground stations.

Earlier in the day, the ISRO Chairman Somnath congratulated the whole ISRO team after the successful launch of NVS-01.

“I would like to congratulate everyone on the outcome. The satellite is placed in the precised orbit. Congratulates to the entire ISRO for making this mission happen,” ISRO Chairman Somnath said in a press conference.

He appreciated the fact that the mission was accomplished after doing the rectifications after suffering a debacle during the last mission.

“This mission GV-F12 came after the debacle that happened in the F-10 mission where there was an issue in the cryogenic stage and the cryogenic engine could not get accomplished. I am very happy that the correction and modification at the cryogenic stage were done and we learnt the lessons to make our cryogenic stage more reliable. I want to specifically congratulate the entire ‘Failure Analysis Committee’ who went through this and made our life much better and also for the Liquid Propulsion System,” he said.

Somnath added, “Today the Navigation Satellite NVS-01 is the second generation of navigation satellite with additional capabilities that we have already brought into the satellite constellation where we make the signals more secure. We made a civilian frequency band L-1 and also introduced our Atomic Clock. And this is one of the five series of satellites with new configurations that are to be launched. I would like to thank all those who worked for this satellite and make the mission a grand success”.

Appreciating the government support, the ISRO Chairman also thanked the authorisation of the GSLV launch despite a failure during the last attempt.

“The confidence of the decision makers, our honourable Prime Minister Narendra Modi and other key functionaries who reviewed it to see that we have done the required work. The Navic Constellation is something very crucial for the nation to have a regional navigation constellation. I take this opportunity to tell you that we are going to make this Navic system fully functional and operational for the benefit of this nation,” he said.

He further said that the satellite is currently in Geosynchronous Transfer Orbit, from where it is the responsibility of the satellite team to correctly place it in the orbit.

Apprising about the future missions of ISRO, Chairman Somnath said, “In the coming months, we are going to launch PSLV as well as GSLV Mark-3. We are also going to launch the test vehicle of the Gaganyan (Man mission). Of course, the launches of further PSLV and SSLV are also in line”

“We are having the next launch of GSLV with a Climate and weather observation satellite called INSAT-3DS, which will be happening soon. And after that, the same rocket is bound to take NISR – India Nasa Synthetic Alergic Radar Satellite as well,” he added.


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Astronomers Detect Methane in the Atmosphere of the Nearest T Dwarf Star to Earth

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Astronomers Detect Methane in the Atmosphere of the Nearest T Dwarf Star to Earth

The scientists have found methane in the atmosphere of WISEA J181006.18 −101000.5, the T dwarf closest to Earth. The study was published in the online preprint journal arXiv on March 28, and the final, revised version was published on November 17. The WISE1810 is a metal-poor T dwarf planet, which is situated at a distance of 29 light years from the Earth. The effective temperature of the dwarf is reported to be within the range of 800–1,300 K.

Methane Signature Surprises Astronomers

According to a Phys.org report, the finding is made greatly possible by the present 10.4-m Gran Telescopio Canarias (GTC). The detection of methane in the atmosphere of the dwarf planet has further made its classification as T-type instead of L-type, which was earlier suggested in previous studies, the publication notes. The study further reveal that there are no traces of carbon monoxide and potassium in the atmosphere of the WISE1810. 

The study further highlights that the carbon abundance in the planet is estimated to be -1.5 dex, while the effective temperature could be around 1,000 K. The author of the paper further revealed that the low metallicity of the T dwarf planet could be due to the non-detection of atomic potassium. However, a lower temperature could also boost this effect, the report further highlights. The study also found that WISE1810 has a heliocentric velocity of -83 km/s. 

The 10.4-m Gran Telescopio Canarias (GTC) supplies a significant contribution to finishing WISEA J181006.18−101000 observations. Interestingly, the previous observations of the dwarf platent suggested that the atmosphere of the dwarf planet was dominated by hydrogen and water vapour. Moreover, the study further reveals that findings indicates WISE1810 could more likely to be associated with the Milky Way’s thick disk, despite its very low metallicity.

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Scientists Finally Discover How Long a Day Lasts on Uranus

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Scientists Finally Discover How Long a Day Lasts on Uranus

Scientists have finally found how about Uranus day length using the most recent analysis of a decade’s worth of Hubble Space Telescope data. As per the scientists, the Uranus holds 17 hours, 14 minutes, and 52 seconds to finish a complete rotation—that is, 28 seconds more than the estimation served by NASA’s Voyager 2 spacecraft. This estimation was made possible through the measurement of the magnetic fields and the radio waves coming from the auras of the planet. This understanding helps one derive surface mapping and alignment estimation in perplexing surroundings. Some of those maps may need to be reconsidered based on the most recent research.

Hubble Refines Uranus’ Spin and Orbit Time

According to reports, the Hubble Space Telescope study verified Uranus completed a revolution in 17 hours, 14 minutes, and 52 seconds. That is 28 seconds more than the NASA mission Voyager 2, from the 1980s.

The report further mentions that through examination of a ten-year record of aurora observations, a team headed by Laurent Lamy at the Paris Observatory in France revealed the magnetic poles of the planet. That long-term monitoring gave even more exact rotation periods—that is, nearly 84 Earth years for Uranus to orbit the sun.

Uranus’ Rotation Refined, Aiding Future Exploration

On Uranus, a day just lasts far longer. More precise rotational time observations of the gas giant should enable scientists to plan visits to investigate it. Unlike on Mars and Earth, savage windstorms make it far more difficult to identify the rotation times of the biggest solar system planets.

The first estimate of Uranus’s spin was shifted closer to the Voyager 2 probe, which made a close-range approach on January 24, 1986. The researchers during that time found out that the planet’s mangetic field was by 59 degrees from celestial north. Moreover, the researchers observed that its rotation axis was 98 degrees offset.

Uranus Spins Sideways with a 17-Hour Day, Scientists Confirm

The report further mentions that Uranus effectively revolves “lying down” compared to Earth; during this period, its magnetic poles find a giant circle as the planet rotates. These highest offsets mean With a safety margin of plus or minus 36 seconds, scientists at the time estimated that Uranus was completing a full revolution in every 17 hours, 14 minutes, and 24 seconds by measuring the magnetic field of the planet as well as radio emissions from aurora at its magnetic poles.

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Farallon Slab Beneath Midwest Pulls Crust Downward, Causing Widespread Thinning

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Farallon Slab Beneath Midwest Pulls Crust Downward, Causing Widespread Thinning

An underground structure beneath central United States has been observed dragging surface materials deep into the Earth. This movement has been linked to an old piece of crust lodged far below the Midwest. Researchers have said this action is pulling rocks from across the continent towards a funnel-shaped region. It is believed this process is causing parts of the crust to thin as material is drawn downward. This phenomenon has been found to affect areas beyond the immediate region.

Underground slab tied to crust loss beneath Midwest

According to the study published in Nature Geoscience, the phenomenon has been tied to the remains of a long-subducted tectonic plate known as the Farallon slab. This slab, which sits around 660 kilometres below the surface, was identified as the driving force behind what scientists refer to as cratonic thinning. Cratons are known to be the stable core regions of continental crust and upper mantle that usually do not undergo change.

The seismic mapping project was led by Junlin Hua during his postdoctoral work at The University of Texas at Austin. He now serves as a professor at the University of Science and Technology of China. In a statement, Hua explained that a wide region is showing signs of thinning. He stated that the study has brought forward a new explanation behind this change.

New seismic method uncovers ‘dripping’ lithosphere

To observe the changes taking place beneath North America, researchers used a method known as full-waveform inversion. This seismic imaging approach allowed them to map the subsurface in high detail. According to Thorsten Becker, Geophysics Chair at UT Austin, this technique offered a better understanding of the link between deep mantle regions and the lithosphere above.

Computer simulations were used to confirm the effect. When the slab was included, the downward movement was visible. When removed, no such feature appeared.

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