Raymond Scott Pert · @raymondpert
1678 followers · 682 posts · Server mstdn.social

Why Chandrayaan-3 is a great step forward for Indian space programme

> After four decades of orbiter missions, lunar exploration gathered steam again in 2019, as three missions attempted soft landing. Chang’e 4 of China landed successfully on the far side of the moon along with the Yutu-2 rover. Beresheet is notable for being the first Israeli and the first privately funded lunar landing attempt, but it crashed
theweek.in/theweek/cover/2023/

#Space #moon #India #Chandrayaan3

Last updated 1 year ago

Simeon Schmauß · @stim3on
649 followers · 919 posts · Server fosstodon.org

The mission surprised yet again, when the lander did a short hop on the lunar surface yesterday. It repositioned itself by about 40 cm.

I upscaled and interpolated the official video by ISRO.
twitter.com/isro/status/169857

Credit: /Simeon Schmauß

#Chandrayaan3 #vikram #isro

Last updated 1 year ago

Mathew Thomas · @mathewthomas
14 followers · 1408 posts · Server mstdn.social
Bill Minarik · @silicatefondue
208 followers · 566 posts · Server fosstodon.org

@Geotripper Nice photo! High noon for the lander/rover. The mission is halfway through -it started at dawn and will end (probably) at dusk, two weeks from now.

#Chandrayaan3 #moon #solarsystem #solarpower

Last updated 1 year ago

Simeon Schmauß · @stim3on
625 followers · 903 posts · Server fosstodon.org

Two days ago the Lander imager camera on captured the rover doing a 360 turn. You can see it pushing up a lot of lunar regolith with its wheels.

I upscaled and interpolated the official video by ISRO:
twitter.com/isro/status/169715

Credit: /Simeon Schmauß

#vikram #pragyan #Chandrayaan3 #isro

Last updated 1 year ago

Mathew Thomas · @mathewthomas
14 followers · 1399 posts · Server mstdn.social
Simeon Schmauß · @stim3on
596 followers · 888 posts · Server fosstodon.org

The full landing sequence of

I wrote a python script to undo the frame blending from the original video and then upscaled the images with AI.
The video is at 120x playback speed, in reality this took about 66 minutes.

Credit: / Simeon Schmauß

#Chandrayaan3 #isro

Last updated 1 year ago

· @NaturalNews
6250 followers · 32148 posts · Server brighteon.social
Michael Martine · @michaelmartine
58 followers · 448 posts · Server mstdn.social
Michael Martine · @michaelmartine
58 followers · 448 posts · Server mstdn.social

for @gamesatwork_biz e430 are done, and publication set for tomorrow on gamesatwork.biz and all your favorite podcast feeds! Topics this week include , , , , , , , and much more! Be sure to subscribe so you don’t miss an episode!

#StarWars #tenaciousd #Roblox #woodencomputers #kinect #atari #holoprojectors #visionpro #Chandrayaan3 #Podcast #shownotes

Last updated 1 year ago

Michael Martine · @michaelmartine
58 followers · 439 posts · Server mstdn.social

on the jamming to some for @gamesatwork_biz in preparation for tomorrow's posting of e430 — stories & toots about , , , , , , , and a whole lot more! Check out the earlier episodes, chock full of and so much more on gamesatwork.biz

#gamification #vr #ar #metaverse #AI #StarWars #tenaciousd #Roblox #woodencomputers #kinect #atari #holoprojectors #visionpro #Chandrayaan3 #EarthWindandFire #grind #shownotes

Last updated 1 year ago

AkaSci 🛰️ · @AkaSci
1921 followers · 1856 posts · Server fosstodon.org

The moon is a harsh place for humans and life. It has no atmosphere or magnetic field, there is harmful solar and cosmic radiation and it is subject to extreme temperatures.

Daytime surface temps near the lunar equator can reach 120° C, while nighttime temps get to a chilly -130° C. Temps near the poles are even lower, as low as -250°C, as measured by the NASA LRO Orbiter.

Certain crater areas have lower average temps and lower temp variations.

lunar.gsfc.nasa.gov/images/lit

6/n

#Chandrayaan3

Last updated 1 year ago

AkaSci 🛰️ · @AkaSci
1903 followers · 1843 posts · Server fosstodon.org

It is wonderful to see Chandrayaan-3 data published by ISRO scientists in such a timely manner.

Would be helpful if they also provide date/time when the data was collected.

Also, some more context and relevance of the data, and some description of the instruments and techniques used would be useful for science outreach purposes.


5/n

#Chandrayaan3

Last updated 1 year ago

AkaSci 🛰️ · @AkaSci
1903 followers · 1842 posts · Server fosstodon.org

Closer to the lunar surface, the temperature ranges and gradients are much higher, as measured by Apollo 15 and 17.

The 1st graph below shows average temp by depth (it is not the temp. at any particular time of the day, which is what we see in the CH3 data).

The 2nd graph shows peak-to-peak temp. variation by depth. As expected, variations are lower as one goes deeper.

The Apollo missions made measurements for several years.


4/n

#Chandrayaan3

Last updated 1 year ago

AkaSci 🛰️ · @AkaSci
1903 followers · 1841 posts · Server fosstodon.org

Here is some data from the Apollo 15 and 17 measurements of sub-surface temperatures. Below 2 meters, the temperature remained fairly constant around -16C.

Of course, the temp. profile varies across night and day and across latitudes. Also, surface temps vary across a wide range across 28 days.

There is great interest in finding depths and locations with narrow temp. ranges suitable for human habitats.

ntrs.nasa.gov/api/citations/19

3/n

#Chandrayaan3

Last updated 1 year ago

AkaSci 🛰️ · @AkaSci
1903 followers · 1841 posts · Server fosstodon.org

Sub-surface temp. measurements were made by the Apollo and the Chang'e landers, but none near the South pole, although there are plenty surface of surface measurements made using the Diviner instrument on the NASA LRO orbiter.

Apollo 15 and 17 made measurements near the equator at depths up to 2 m. CH3 measurements have max depth of 8 cm.

Below are diagrams of the probes used by Apollo 15 and 17.

articles.adsabs.harvard.edu/cg

2/n

#Chandrayaan3

Last updated 1 year ago

Andrew Steele · @statto
631 followers · 1401 posts · Server mas.to

Should India have a space program when hundreds of millions of Indians live in poverty?

ABSOLUTELY YES. Here’s a one-minute video explaining why: youtube.com/shorts/MV5skFSyWls

#poverty #space #india #Chandrayaan3

Last updated 1 year ago

AkaSci 🛰️ · @AkaSci
1900 followers · 1839 posts · Server fosstodon.org

As the day grows, the shadows shrink at the landing site of the Chandrayaan-3 lander and rover.

The following chart shows the approximate length of the shadow for unit height over the current lunar day.

The shadow shrunk from about 4x to 3x in the past two days but will not shrink much more from here onwards.

Note that we do not have the precise time when these images were taken.

The height of the solar panel is approx. equal to the width of the rover.


19/n

#Chandrayaan3 #isro

Last updated 1 year ago

AkaSci 🛰️ · @AkaSci
1898 followers · 1834 posts · Server fosstodon.org

New video of Chandrayaan-3 rover Pragyan checking out its new neighborhood.

youtu.be/S9UlIFmEKJ0

18/n

#Chandrayaan3 #isro

Last updated 1 year ago

AkaSci 🛰️ · @AkaSci
1898 followers · 1834 posts · Server fosstodon.org

Here is a plot that shows the approximate elevation of the Sun (degrees above horizon) at the Chandrayaan-3 lander site on the lunar surface.

Given that Chandrayaan-3 is at 69.37° S latitude, the maximum elevation is around 20°. Hence the near-vertical orientation of the solar panels on the lander and the rover. The Sun will disappear below the horizon and the mission will come to an end around Sep 4.

Calculation info: the-moon.us/wiki/Sun_Angle

@barrygoldman1
17/n

#Chandrayaan3 #isro

Last updated 1 year ago