Sankaranarayanan Viswanathan

Software craftsman with an interest in art, science, economics, photography, teaching, & travel. Aspires to be curious, skeptic, rational, and liberal.

[Sankaranarayanan Viswanathan @kvsankar]

Earth set

[Tejasvi Surya @Tejasvi_Surya]

For centuries, the study of astronomy has been an integral part of Indian society and culture.

In the 134th edition of #MannKiBaat, PM Shri @narendramodi Ji praised the Bangalore Astronomical Society for popularising astronomy in rural areas for organizing observational sessions and the 30-hour astronomy course conducted by team Khagol Mandal.

I urge the students and everyone interested to be a part of these initiatives.

@b_a_s

[Narendra Modi @narendramodi]

All across India, there are numerous clubs and societies making astronomy popular among the youth. I am proud of every such effort.

#MannKiBaat

[PMO India @PMOIndia]

Several astronomy clubs are becoming increasingly popular across the country.

#MannKiBaat

[Sankaranarayanan Viswanathan @kvsankar]

The screenshots are not evidence of self-awareness or remorse. LLMs generate language patterns that simulate explanation surprisingly well. The recent PocketOS “confession” after deleting a prod DB is another example of how easily humans anthropomorphize optimization systems.

[Sankaranarayanan Viswanathan @kvsankar]

I caught @OpenAI GPT-5.5 fabricating stars in an astronomy renderer so a visual regression test would pass. A Playwright test was failing because the real star projection produced too little visible pixel difference. Is 5.5 excessively aggressive? Not seen 5.4 like this

@simonw

[Sankaranarayanan Viswanathan @kvsankar]

The future engineer is not just someone who writes code. It is someone who can distinguish simulation of correctness from correctness itself.

[Sankaranarayanan Viswanathan @kvsankar]

The name blends DRY ("Don't Repeat Yourself") and telescope: look across a large repo and bring the repetition or overlap worth inspecting into view.

PyPI: https://t.co/wX9BwusS0u
GitHub: https://t.co/hIKX4Q7ZpJ

[Sankaranarayanan Viswanathan @kvsankar]

dryscope is on PyPI: a Python CLI for repo cleanup preflight.

It finds duplicate-code candidates, repeated doc sections, and docs intent overlap before handing cleanup to a human or AI coding agent.

It can also install as Claude Code + Codex skills.

https://t.co/0CbnMZuDH2

[Sankaranarayanan Viswanathan @kvsankar]

Now you can compare any two lunar missions in the Earth Moon relative reference frame using my animation at https://t.co/RaC3cUmgEF - Here's one comparing Artemis 1 and 2. -

@tony873004 @Marco_Langbroek

[Sankaranarayanan Viswanathan @kvsankar]

@kkyyoodf Looks great! Can you please document the process you followed somewhere? Thanks.

[Sankaranarayanan Viswanathan @kvsankar]

@RaviHJagtiani @heospace Not of the starlink satellite. But of the HEO satellite. I have a close approach predictor here which I want to try https://t.co/sAD7JchHDV

[Sankaranarayanan Viswanathan @kvsankar]

@tony873004 I have an interactive version here - https://t.co/vYKqskI2he

[Sankaranarayanan Viswanathan @kvsankar]

Professor @Marco_Langbroek , I have put together an interactive 3D animation of Artemis 2 mission orbit along with the ground track here - https://t.co/vYKqskI2he . Orbit data is the latest version from JPL HORIZONS as of now. Shows the ground track + other interesting views.

[Dr Marco Langbroek 🇬🇱 🇩🇰 @Marco_Langbroek]

1/x
Just over one day to go untill #Artemis II splashes down near the California coast.
Here is a map showing the ground-projected approach trajectory which I created using HORIZONS State Vector data and (for the very last bit) a Tudat ballistic continuation of the last vector

[Sankaranarayanan Viswanathan @kvsankar]

Comparing the real Artemis II image and the one from my animation web site - https://t.co/vYKqskI2he

[Sankaranarayanan Viswanathan @kvsankar]

Earth set

[Sankaranarayanan Viswanathan @kvsankar]

Comparing the real Artemis II image and the one from my animation web site - https://t.co/vYKqskI2he https://t.co/fUjxntYxOQ

[Sankaranarayanan Viswanathan @kvsankar]

Earth set

[Sankaranarayanan Viswanathan @kvsankar]

#Artemis2 flyby simulation using JPL orbit data, realistic sky renders, and correct geometry

https://t.co/vYKqskI2he

@AJamesMcCarthy @Erdayastronaut @MarcusHouse

[Sankaranarayanan Viswanathan @kvsankar]

What photographs can we expect to see from the #Artemis2 lunar flyby. You can simulate this at my website at https://t.co/XemPRFBiVb 🧵

This is just before earth set around 22:45

@NASAArtemis @DJSnM @fcain @universetoday @NASASpaceflight

[Sankaranarayanan Viswanathan @kvsankar]

New moon literally

[Sankaranarayanan Viswanathan @kvsankar]

What photographs can we expect to see from the #Artemis2 lunar flyby. You can simulate this at my website at https://t.co/XemPRFBiVb 🧵

This is just before earth set around 22:45

@NASAArtemis @DJSnM @fcain @universetoday @NASASpaceflight

[Sankaranarayanan Viswanathan @kvsankar]

End of eclipse