Bharat Rakshak

disha

Disha ji, ...The mask issue has been largely blown out of proportion IMO. In many East Asian countries, people have been routinely wearing masks when they have a cold or flu since decades. Its out of simple courtesy to avoid exposing other people to something you are carrying that you know is conta...

disha

We need to improve our rocket's thrust quickly. How long will it take for us to reach Venus If we use the slingshot method? Aditya l1 takes 109 days to cross 1.5 million km, Venus is 61 million km away. 😂😂 The central government should, first of all, assign funds for NGLV. Then why is ISRO going wi...

disha

... Last week, I was discussing about a hypothesis if the lander could hop to another location where sunlight is available. Isro proved me partially correct, however, it will need a lot of fuel which will increase its weight. As the moon's gravity is 1.62 m/s² and with no atmosphere available on th...

disha

Wow... is this true? US Plan to nuke the moon to show its superiority Yes, the above is true. US has hidden away those discussions as "top secret". Just shows how much US was interested in actual science then. BTW, the physics behind the plan was calculated among others by one Carl Sagan....

disha

Atcually Giordano Bruno was burnt at the stake for proposing SOlar centered universe and stars being distant suns. https://en.wikipedia.org/wiki/Giordano_Bruno Thanks for bringing up Giordano Bruno. Yes, Bruno was burnt at the stake for his very radical theories of helio-centric system(s) and for s...

disha

Hospitals in the area, and some other places have started (or thinking of starting) Mask mandate again. Some countries are implementing serious testing.. Several places are putting back mask mandates. More as a social pressure and out of fear and panic and more like CYA, I think, rather than actual...

disha

bharathp wrote: ↑01 Sep 2023 07:58 365.24 is the year around the sun. from any arbitary point, back to the same point

Tropical Year, but not related to movement around the sun, but earth doing Surya Namaskar twice a year.

disha

sudarshan wrote: ↑01 Sep 2023 07:53 365.24219 days-----------------?
365.25964 days-----------------Perihelion to perihelion?

365.24219 days----------------- > Tropical Year.
365.25964 days-----------------Perihelion to perihelion. Or Aphelion to aphelion

disha

^ BharatP, since Moon is orbiting around Earth, a moon year is the same as complete revolution around Earth. Which is ~27 days. At the same time Moon being tidally locked, does a rotation on its own axis which again is ~27 days. So assuming Earth as a center, the moon year is same as moon month whic...

disha

madhu wrote: ↑29 Aug 2023 19:48 Complied all info to compare planned vs actual.

^This is a keeper.

disha

Vivek Ramaswamy gives me a very "Chatur Ramalingam" vibe...all the intense sucking up to Trump and every "good ole boy" tradition. Another fast-talking lawyer with no real accomplishments, in the mold of Obamudu (who did manage to take USA for a ride for 8 years). In particular,...

disha

Coming back to needing a "sane" president....Ramaswamy is young in his 30s, and his views are, well....much younger than him. :rotfl: They are what I would expect from a hormone-loaded teenager. E.g., he says there are two genders and talks about X and Y chromosomes. Doesn't understand th...

disha

i revisited landing video was unable to make out any sudden drop of lander in the animation of lander at touch down, after engine cut off. same was the case in the footage of lander camera, no definitive sudden drop evident. The drop on moon will be gentler. 1/6th "slower". To perceive fr...

disha

https://www.google.com/amp/s/www.scientificamerican.com/article/chandrayaan-3-makes-historic-touchdown-on-the-moon/%3famp=true Finally, on touchdown, sensors on the lander’s legs triggered the shutdown of its main engines. Chandrayaan-3 now stands tall on the moon . the above is from a scientific a...

disha

Ashokk wrote: ↑25 Aug 2023 13:57 Sushant Sareen gives it back to the UK

^Excellent response by Sushant Sareen. I am forwarding that clip to some of my ex-colleagues.

disha

Even though I can't understand half of Dishaji and AmberGs posts on math, space and medicine, I propose.... Can we just appoint AmberG as BRs Bill Nye, the Science Guy ( or should it be, gal?). AmberG, is BR's Scienceji. There. That's proper desi and even rhymes. Screw Bill Nye. Hey CainJi, thanks....

disha

Engines cutoff a meter of two above the surface seems excessive in my opinion especially if there is a possibility of a bounce( in low lunar gravity) with uneven time of touchdown (due to uneven weight distribution of the LM) of the each of the four legs. Thx for doing the calculations. The engines...

disha

Would we be able to repurpose the SHAPE instrument for analyzing any other planet if all of the habitable planet earth planned experiments are completed as someone else asked? In other words what advantages can be derived from the extended life of the PM? Also if you have both CH-2 and PM in large ...

disha

I've few questions popped in my mind after this landing. 1. With lunar gravity very low, returning to earth should consume much less thrust. What would be the ratio , is it 1:100? 2. Entering back to earth, how much thrust ratio needed compared to escaping the earth's gravity, my understanding is h...

disha

Great news and an amazing video! Love the pop-up the Astra does once is clears the aircraft While the 400 missile order is a good start, its nowhere near enough to confront 2 adversaries. Just for comparison, beggar Pakis have stockpiled 500 AIMs Hope the IAF is not waiting for Astra-Mk2. Need a ma...

disha

Roop wrote: ↑24 Aug 2023 06:09 Is that true, though? I thought the Americans had a Viking lander there. Maybe I'm mistaken. Amber / SSS, any comments?

Roop'ji, please do a simple google search.

disha

I hope India continues to build on this work, sending bigger and more robust landers to the lunar surface, transporting higher-mass payloads including bigger and more robust rovers, which can carry out more robust lunar surface exploration and discoveries. +72. The lander is going to return, right?...

disha

I thought Change e was a showcase of autonomous systems and communication relays. I really wonder about the algorithms and data fusion of Vikram to steer the craft so wonderfully. I wonder if it is world class. In which case one can anticipate demand for collaborations. Here are my notes on the Aut...

disha

Waiting for the video of the Rover, that is when I am going to lose it :) Why wait saar! Pragyaan is like a baby taking its first tentative steps. It will look only cute when it walks on the moon. The feeling of exhilaration on a tough mission accomplished successfully, yes 99.9% of the mission com...

disha

CNN (not IBN but the Amrikan wala channel) had this ex NASA astronaut and professor in their studios to talk about Indian moon landing and he was saying that no one attempted to land on the south pole so far because no body thought it was feasible . But in 2019 we almost did it and that should have...

disha

Cyrano wrote: ↑23 Aug 2023 23:17 Unfortunately our DD camera crew isn't deployed on the moon saar. Perhaps thats a good thing

They need to be deployed on the far side of the moon.

disha

Why the Rover roll out is so hush hush? At this point, Rover is bonus. Yes, it needs to race to the nearest crater and find ice and minerals and claim that crater for India and Humanity. But 99% of the complexity of the mission has been overcome. What rover will face will be engineering challenges.

disha

... BIggest thing they are probably looking at pictures in front of the lander Vikram and whether it has clear space to roll out a ramp so PRagyaan can come out smoothly. (My speculation: if this is not possible and there is boulder in front of Vikram, the 'hop' of the lander that people were specu...

disha

First image from Vikram of the Moon's surface following the landing: https://pbs.twimg.com/media/F4OUkKVa8AEtHsA?format=jpg&name=medium Beautiful. And thanks! ~8M live stream viewers for C3 landing :eek: and now the current viewership of C3 landing is ~40M. It will easily cross ~50M by end of t...

disha

Maybe they were hedging against a negative event and didn't want to do an ultra-zoom on what could have been a disaster. All in all, job well done. Brilliant people, lots of hard work. Hopefully, India will make this routine. Things can go wrong any time. In the rough breaking phase, fine breaking ...

disha

I for one am glad that it has happened now. My father, born in India under the rule of a foreign power wished to return there in his retirement. Sadly it was not to be. My mother was likewise determined to return but after father's death she came to the UK to be near her four sons. Next Tuesday is ...

disha

Last few seconds DD switched to some close up shot and we could not see real time Hv, Vv and Alt data. Hope DD does a better job when we see the next landings on Mars and Venus. The ISRO official youtube channel did similar - switched to PM Modi in the last 30 seconds or so of the landing. This is ...

disha

Congratulations India/ISRO -------------------------------------------------------------- I mentioned this few pages back: What we must not miss is that we are standing at an epochal movement. A major transition is happening right in front of our eyes. And a massive generational shift. We are witne...

disha

Disha What time is the landing in California time? Live telecast will begin at * US 4:50 AM PDT (California), 7:50 AM EDT (New York). * AUS 9:50 PM Sydney NSW * IST 5:20 PM (India) Link for live telecast below: https://www.isro.gov.in/LIVE_telecast_of_Soft_landing.html ETA for touchdown is ~ 5:34 A...

disha

sanman wrote: ↑23 Aug 2023 06:49 Useful description of the landing procedure:

Cannot believe a day will come when doorknob will be quoted in C3 (or a specific deep space mission) for value of the content of his show!

India has indeed crossed a rubicon! In a very very good way.

disha

chetak wrote: ↑14 Aug 2023 19:53 disha ji,

https://indianexpress.com/article/polit ... f-8892255/

Chetak'ji. Thx for the link. Above is a keeper.

disha

This case has more issues which are not clearly exposed. 1. CMRL was the company who was charged for violating tax norms. The Interim Board for Settlement under the Central Board of Taxes had found serious discrepancies in the financial statement of CMRL. So they had to give a statement explaining ...

disha

how are the modules uncoupled mechanically ? electro mechanical latches? explosive bolts ? ?? I think Ashok'ji or someone posted the information on how C3 separates. It is spring based, the lander is latched to the propulsion module and are cut using bolt cutters. I was wrong in my initial assessme...

disha

SSS and other gurus, i was looking at dry mass and wet mass of CY-3, looks like there might be fuel left in PM, how i wish ISRO surprises us with Vikram taking off mating with PM and coming back to earth and crash burning. Hope CY-4 is already being planned for to-fro trip Vikram cannot mate back w...

disha

First of all thanks Ashok'ji for the informative links that confirmed the separation of C3PM from Lander was enabled by a spring and a latch. Something like this bolt cutters https://psemc.com/products/pyrotechnic-bolt-rod-cutter/ Thanks everyone for posting photos from various sites like ISRO's X/T...

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