Shashikiran Ganesh
@shashikiran.bsky.social
Professor in the Astronomy & Astrophysics Division of Physical Research Laboratory, India
Reposted by Shashikiran Ganesh
Reposting this since many are doing some holiday shopping. I’m not sure if you can use the discount code AND benefit from the current “Black Friday” sale… hoping someone will order and let me know! 🧪🔭
If you’re in the market for a book on the history of astronomy, praised by Cornell prof Martha Haynes as “A terrific blend of the science and the history,” good news! 🧪🔭
I have a 20% discount code for you, valid now through Jan 2026: 25SMA4.
I have a 20% discount code for you, valid now through Jan 2026: 25SMA4.
November 30, 2025 at 2:40 AM
Reposting this since many are doing some holiday shopping. I’m not sure if you can use the discount code AND benefit from the current “Black Friday” sale… hoping someone will order and let me know! 🧪🔭
188! wow!
Woke up w/o alarm at 4:30 to clear skies. Finder & comparison charts were already prepared.
#CometObs
C/2025 K1 (ATLAS): 9.5 mag, 1.5', DC7, 0.25° tail in PA290°, elongated coma, miniature comet
3I/ATLAS: 9.7 mag, 3.5', DC5, no aliens
3I is my 188th visual comet.
🔭☄️
#CometObs
C/2025 K1 (ATLAS): 9.5 mag, 1.5', DC7, 0.25° tail in PA290°, elongated coma, miniature comet
3I/ATLAS: 9.7 mag, 3.5', DC5, no aliens
3I is my 188th visual comet.
🔭☄️
November 19, 2025 at 5:11 PM
188! wow!
PRL Mount Abu Observatory telescopes report images and spectra of the interstellar comet #3I/ATLAS, showing spectral features similar to those seen in solar system comets. 🧪🔭
The press release:
www.isro.gov.in/Observations...
Astronomer's Telegram:
www.astronomerstelegram.org?read=17502
The press release:
www.isro.gov.in/Observations...
Astronomer's Telegram:
www.astronomerstelegram.org?read=17502
www.isro.gov.in
November 19, 2025 at 4:22 PM
PRL Mount Abu Observatory telescopes report images and spectra of the interstellar comet #3I/ATLAS, showing spectral features similar to those seen in solar system comets. 🧪🔭
The press release:
www.isro.gov.in/Observations...
Astronomer's Telegram:
www.astronomerstelegram.org?read=17502
The press release:
www.isro.gov.in/Observations...
Astronomer's Telegram:
www.astronomerstelegram.org?read=17502
Reposted by Shashikiran Ganesh
Live in the Northern Hemisphere and want to see a comet older then the Solar System? Nice overview of upcoming pre-dawn visibility for interstellar comet 3I/ATLAS with small amateur telescopes 🔭🧪
All Eyes on Interstellar Comet 3I/ATLAS
Interstellar comet 3I/ATLAS will soon exit the Sun's glare to enter the morning sky. Get ready for the observing opportunity of a lifetime.
skyandtelescope.org
November 1, 2025 at 10:01 AM
Live in the Northern Hemisphere and want to see a comet older then the Solar System? Nice overview of upcoming pre-dawn visibility for interstellar comet 3I/ATLAS with small amateur telescopes 🔭🧪
Reposted by Shashikiran Ganesh
In a crumbling four-story wada in Pune’s old quarter, an upstairs room stayed stubbornly off the grid.
There, a small woman in a plain cotton sari wrote longhand by daylight or by kerosene lamp.
This was Hema Sane, a botanist who turned her life into an experiment in ecological consistency.
There, a small woman in a plain cotton sari wrote longhand by daylight or by kerosene lamp.
This was Hema Sane, a botanist who turned her life into an experiment in ecological consistency.
Hema Sane, botanist who lived without electricity, died on September 19th
In a crumbling four-story wada in Pune’s old quarter, where temple bells compete with motorbike horns and hawkers press against the walls, an upstairs room stayed stubbornly off the grid. There,…
news.mongabay.com
September 28, 2025 at 8:01 PM
In a crumbling four-story wada in Pune’s old quarter, an upstairs room stayed stubbornly off the grid.
There, a small woman in a plain cotton sari wrote longhand by daylight or by kerosene lamp.
This was Hema Sane, a botanist who turned her life into an experiment in ecological consistency.
There, a small woman in a plain cotton sari wrote longhand by daylight or by kerosene lamp.
This was Hema Sane, a botanist who turned her life into an experiment in ecological consistency.
Reposted by Shashikiran Ganesh
I would love to get the hashtag #blessedunrest going (after the book by Paul Hawken.) To celebrate, in the face of all the madness, the quiet (or not) voices and actions all over the world that are conserving the good and repairing the shattered.
#environment #nature 🌿
#environment #nature 🌿
In a crumbling four-story wada in Pune’s old quarter, an upstairs room stayed stubbornly off the grid.
There, a small woman in a plain cotton sari wrote longhand by daylight or by kerosene lamp.
This was Hema Sane, a botanist who turned her life into an experiment in ecological consistency.
There, a small woman in a plain cotton sari wrote longhand by daylight or by kerosene lamp.
This was Hema Sane, a botanist who turned her life into an experiment in ecological consistency.
Hema Sane, botanist who lived without electricity, died on September 19th
In a crumbling four-story wada in Pune’s old quarter, where temple bells compete with motorbike horns and hawkers press against the walls, an upstairs room stayed stubbornly off the grid. There,…
news.mongabay.com
September 29, 2025 at 3:20 PM
I would love to get the hashtag #blessedunrest going (after the book by Paul Hawken.) To celebrate, in the face of all the madness, the quiet (or not) voices and actions all over the world that are conserving the good and repairing the shattered.
#environment #nature 🌿
#environment #nature 🌿
Reposted by Shashikiran Ganesh
📸🔭 October promises to be spectacular for comets:
☄️ C/2025 A6 (Lemmon) will reach magnitude 3–2 and be visible to the naked eye in dark skies.
☄️ C/2025 R2 (SWAN) will shine in binoculars, with long ion tails in photos.
We’ll keep following them day by day on these feeds so you don’t miss the show ✨
☄️ C/2025 A6 (Lemmon) will reach magnitude 3–2 and be visible to the naked eye in dark skies.
☄️ C/2025 R2 (SWAN) will shine in binoculars, with long ion tails in photos.
We’ll keep following them day by day on these feeds so you don’t miss the show ✨
September 29, 2025 at 7:16 PM
📸🔭 October promises to be spectacular for comets:
☄️ C/2025 A6 (Lemmon) will reach magnitude 3–2 and be visible to the naked eye in dark skies.
☄️ C/2025 R2 (SWAN) will shine in binoculars, with long ion tails in photos.
We’ll keep following them day by day on these feeds so you don’t miss the show ✨
☄️ C/2025 A6 (Lemmon) will reach magnitude 3–2 and be visible to the naked eye in dark skies.
☄️ C/2025 R2 (SWAN) will shine in binoculars, with long ion tails in photos.
We’ll keep following them day by day on these feeds so you don’t miss the show ✨
Reposted by Shashikiran Ganesh
What a difference a decade makes! Announcing the clearest #GravitationalWave detection ever #GW250114
youtu.be/2XmZ8-XQ9jU
📓: doi.org/10.1103/kw5g...
🔭🧪⚛️☄️ #O4IsHere
youtu.be/2XmZ8-XQ9jU
📓: doi.org/10.1103/kw5g...
🔭🧪⚛️☄️ #O4IsHere
GW250114 – The Clearest of Chirps
YouTube video by LIGO Virgo KAGRA
youtu.be
September 10, 2025 at 4:20 PM
What a difference a decade makes! Announcing the clearest #GravitationalWave detection ever #GW250114
youtu.be/2XmZ8-XQ9jU
📓: doi.org/10.1103/kw5g...
🔭🧪⚛️☄️ #O4IsHere
youtu.be/2XmZ8-XQ9jU
📓: doi.org/10.1103/kw5g...
🔭🧪⚛️☄️ #O4IsHere
Reposted by Shashikiran Ganesh
A rather bright comet has been discovered in images of the spacecrafts SOHO/SWAN & STEREO - preliminary designated SWAN25B. It's 7-8 mag and w/ a nice tail. No orbit yet, but from the available data I suspect it could pass very close to Earth soon.
Image by M. Mattiazzo, groups.io/g/comets-ml/...
🔭☄️
Image by M. Mattiazzo, groups.io/g/comets-ml/...
🔭☄️
September 12, 2025 at 1:18 PM
A rather bright comet has been discovered in images of the spacecrafts SOHO/SWAN & STEREO - preliminary designated SWAN25B. It's 7-8 mag and w/ a nice tail. No orbit yet, but from the available data I suspect it could pass very close to Earth soon.
Image by M. Mattiazzo, groups.io/g/comets-ml/...
🔭☄️
Image by M. Mattiazzo, groups.io/g/comets-ml/...
🔭☄️
September 13, 2025 at 8:55 AM
September 13, 2025 at 8:53 AM
Reposted by Shashikiran Ganesh
Think you know the champions of migration? 🏆 Take our quiz and test your waterbird knowledge while cheering on our Yes We Peli-CAN! racers! 💪
Join the effort: www.birdrescue.org/donate-virtu...
Join the effort: www.birdrescue.org/donate-virtu...
August 20, 2025 at 1:50 AM
Think you know the champions of migration? 🏆 Take our quiz and test your waterbird knowledge while cheering on our Yes We Peli-CAN! racers! 💪
Join the effort: www.birdrescue.org/donate-virtu...
Join the effort: www.birdrescue.org/donate-virtu...
Reposted by Shashikiran Ganesh
July issue of Resonance features Professor Jayant Narlikar. We have articles covering his science, institution building, science communication and science fiction. The Hoyle-Narlikar theory of gravitation is featured as a classic with an introduction.
www.ias.ac.in/listing/arti...
#Astronomy
www.ias.ac.in/listing/arti...
#Astronomy
July 13, 2025 at 7:19 AM
July issue of Resonance features Professor Jayant Narlikar. We have articles covering his science, institution building, science communication and science fiction. The Hoyle-Narlikar theory of gravitation is featured as a classic with an introduction.
www.ias.ac.in/listing/arti...
#Astronomy
www.ias.ac.in/listing/arti...
#Astronomy
Reposted by Shashikiran Ganesh
Watching with awe the first images from @vrubinobs.bsky.social 🧪🔭 Congratulations to the team, it's an amazing achievement and going to be so exciting to see what new things we learn about the universe! Here are a couple screen shots from the broadcast that don't do it justice! 10M galaxies/image!
June 23, 2025 at 3:36 PM
Watching with awe the first images from @vrubinobs.bsky.social 🧪🔭 Congratulations to the team, it's an amazing achievement and going to be so exciting to see what new things we learn about the universe! Here are a couple screen shots from the broadcast that don't do it justice! 10M galaxies/image!
Reposted by Shashikiran Ganesh
Cherish your universities; you never know what amazing things are happening, quietly...
June 1, 2025 at 8:35 PM
Cherish your universities; you never know what amazing things are happening, quietly...
Reposted by Shashikiran Ganesh
Also, on a personal level: I remember visiting Mt John as an undergrad and meeting Pam. A quietly spoken astronomer, accomplishing an awful lot. Twenty years later, I'm an astronomer, also working in planetary defence. You never know where inspiration leads #womeninSTEM 🔭
June 1, 2025 at 10:14 PM
Also, on a personal level: I remember visiting Mt John as an undergrad and meeting Pam. A quietly spoken astronomer, accomplishing an awful lot. Twenty years later, I'm an astronomer, also working in planetary defence. You never know where inspiration leads #womeninSTEM 🔭
Reposted by Shashikiran Ganesh
Delighted to see this honour for Alan Gilmore and Pam Kilmartin. 50+ years of planetary defence work, quiet, unheralded and essential. 🧪🔭🇳🇿
Guardians against the galaxy: Tekapo couple honoured for planetary defence contributions
Guardians against the galaxy: Tekapo couple honoured for planetary defence contributions
A Tekapo couple who have spent the past 50 years helping to track asteroids that could pose a threat to Earth have been jointly awarded the New Zealand Order of Merit.
www.rnz.co.nz
June 1, 2025 at 7:58 PM
Delighted to see this honour for Alan Gilmore and Pam Kilmartin. 50+ years of planetary defence work, quiet, unheralded and essential. 🧪🔭🇳🇿
Reposted by Shashikiran Ganesh
Excellent article about moving past our obsession with lawns and creating #habitat and beauty with more ecologically sound approaches like #meadows full of the #nativeplants that #pollinators need to survive. Good for the bugs, the air, the soil, the soul.
#nature #gardening 🌿
shorturl.at/x5JEK
#nature #gardening 🌿
shorturl.at/x5JEK
'Meadowscaping': The people turning their lawns into meadows
Turning lawns into meadows can have big benefits for people, wildlife and the climate. Here's why 'meadowscaping' has become the latest gardening craze.
shorturl.at
May 11, 2025 at 1:58 PM
Excellent article about moving past our obsession with lawns and creating #habitat and beauty with more ecologically sound approaches like #meadows full of the #nativeplants that #pollinators need to survive. Good for the bugs, the air, the soil, the soul.
#nature #gardening 🌿
shorturl.at/x5JEK
#nature #gardening 🌿
shorturl.at/x5JEK
Reposted by Shashikiran Ganesh
Here's some JWST/NIRCam to brighten your day! 🔭
NGC-5236 is a spiral galaxy located 15 million light-years away. The difference between NIRCam and MIRI is quite fun to see, it also shows the importance to study objects in different wavelengths
HD: flic.kr/p/2qv8h4A
NGC-5236 is a spiral galaxy located 15 million light-years away. The difference between NIRCam and MIRI is quite fun to see, it also shows the importance to study objects in different wavelengths
HD: flic.kr/p/2qv8h4A
November 19, 2024 at 2:47 PM
Here's some JWST/NIRCam to brighten your day! 🔭
NGC-5236 is a spiral galaxy located 15 million light-years away. The difference between NIRCam and MIRI is quite fun to see, it also shows the importance to study objects in different wavelengths
HD: flic.kr/p/2qv8h4A
NGC-5236 is a spiral galaxy located 15 million light-years away. The difference between NIRCam and MIRI is quite fun to see, it also shows the importance to study objects in different wavelengths
HD: flic.kr/p/2qv8h4A
Indian Scops Owl came a visiting... heard high up in the canopy at the lab - the only audio recording from Ahmedabad area (on #Team_eBird
) so far: ebird.org/species/inso...
#birdcountindia
#BirdNET_App identified it above the general hum of the insects; #MerlinBirdID did not
#birds
) so far: ebird.org/species/inso...
#birdcountindia
#BirdNET_App identified it above the general hum of the insects; #MerlinBirdID did not
#birds
September 10, 2024 at 5:32 PM
Indian Scops Owl came a visiting... heard high up in the canopy at the lab - the only audio recording from Ahmedabad area (on #Team_eBird
) so far: ebird.org/species/inso...
#birdcountindia
#BirdNET_App identified it above the general hum of the insects; #MerlinBirdID did not
#birds
) so far: ebird.org/species/inso...
#birdcountindia
#BirdNET_App identified it above the general hum of the insects; #MerlinBirdID did not
#birds
Reposted by Shashikiran Ganesh
I managed to go see ‘Making her mark’ at AGO about women artists in Europe 1400-1800. Not only were there fabulous printmakers but a real focus on #sciart. I was so happy to see several works by Maria Sibylla Merian (1647-1717), entomologist & scientific illustrator #histsci #womenInSTEM 🧵1/n
June 28, 2024 at 3:12 PM
I managed to go see ‘Making her mark’ at AGO about women artists in Europe 1400-1800. Not only were there fabulous printmakers but a real focus on #sciart. I was so happy to see several works by Maria Sibylla Merian (1647-1717), entomologist & scientific illustrator #histsci #womenInSTEM 🧵1/n
This spotted owlet was hidden in the branches of a Mango tree. I saw it while looking for a Grey Hornbill that had come flying into the tree. This bird sat quite still and just rotated its head toward the directions from where it could hear nearby ibis and lapwings. #birds #IndiaBirding #nature
June 21, 2024 at 3:05 PM
This spotted owlet was hidden in the branches of a Mango tree. I saw it while looking for a Grey Hornbill that had come flying into the tree. This bird sat quite still and just rotated its head toward the directions from where it could hear nearby ibis and lapwings. #birds #IndiaBirding #nature