Dr Rok Nežič 🇸🇮🇬🇧
@roknezic.bsky.social
Science Educator, PhD in Planetary Science,
Armagh Observatory & Planetarium. Ask me about comets/polarimetry! 😊☄🌌 I'm a 🔭, 📚, 📸 , 🏞 enthusiast. He/him (@roknezic in most places)
Armagh Observatory & Planetarium. Ask me about comets/polarimetry! 😊☄🌌 I'm a 🔭, 📚, 📸 , 🏞 enthusiast. He/him (@roknezic in most places)
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
me: there’s a meteor shower!
husband: where?
me: in the sky
husband: 😑😑😑 no like which direction
husband: where?
me: in the sky
husband: 😑😑😑 no like which direction
December 15, 2025 at 5:46 AM
me: there’s a meteor shower!
husband: where?
me: in the sky
husband: 😑😑😑 no like which direction
husband: where?
me: in the sky
husband: 😑😑😑 no like which direction
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
I am often asked: What is the best telescope to buy for someone just getting into astronomy?
🪐🔭👀
As a theorist, I am absolutely useless and can tell you nothing. HOWEVER, my friend the wonderful @philplait.bsky.social is NOT useless and has great advice & relevant links here! ⤵️
🪐🔭👀
As a theorist, I am absolutely useless and can tell you nothing. HOWEVER, my friend the wonderful @philplait.bsky.social is NOT useless and has great advice & relevant links here! ⤵️
BAN #275: Telescope buying advice, Book: It’s Alive, Dial-A-Moon 2021
30 November 2020 Issue #271
badastronomy.beehiiv.com
December 7, 2025 at 3:48 PM
I am often asked: What is the best telescope to buy for someone just getting into astronomy?
🪐🔭👀
As a theorist, I am absolutely useless and can tell you nothing. HOWEVER, my friend the wonderful @philplait.bsky.social is NOT useless and has great advice & relevant links here! ⤵️
🪐🔭👀
As a theorist, I am absolutely useless and can tell you nothing. HOWEVER, my friend the wonderful @philplait.bsky.social is NOT useless and has great advice & relevant links here! ⤵️
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
For exactly 25 years humans have continually occupied space on the International Space Station. 290 people from 26 countries. NASA image. 🔭 🧪
November 2, 2025 at 4:02 PM
For exactly 25 years humans have continually occupied space on the International Space Station. 290 people from 26 countries. NASA image. 🔭 🧪
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
If there is one physics formula everyone knows, it's E=mc².
Einstein proposed the famous equivalence between energy and mass in his second special relativity manuscript. It was received by Annalen der Physik #OTD in 1905, the day after they published his first special relativity paper. 🧪 ⚛️
Einstein proposed the famous equivalence between energy and mass in his second special relativity manuscript. It was received by Annalen der Physik #OTD in 1905, the day after they published his first special relativity paper. 🧪 ⚛️
September 27, 2025 at 9:50 PM
If there is one physics formula everyone knows, it's E=mc².
Einstein proposed the famous equivalence between energy and mass in his second special relativity manuscript. It was received by Annalen der Physik #OTD in 1905, the day after they published his first special relativity paper. 🧪 ⚛️
Einstein proposed the famous equivalence between energy and mass in his second special relativity manuscript. It was received by Annalen der Physik #OTD in 1905, the day after they published his first special relativity paper. 🧪 ⚛️
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
Cecilia Payne-Gaposchkin ✨ figured out what stars are made of ✨ when she was just 25. 🔭🧪
Her PhD thesis basically established the Harvard astro department — at a time when Harvard didn't officially allow woman students.
I wrote this little profile to mark the 100th anniversary of her thesis:
Her PhD thesis basically established the Harvard astro department — at a time when Harvard didn't officially allow woman students.
I wrote this little profile to mark the 100th anniversary of her thesis:
September 24, 2025 at 9:14 AM
Cecilia Payne-Gaposchkin ✨ figured out what stars are made of ✨ when she was just 25. 🔭🧪
Her PhD thesis basically established the Harvard astro department — at a time when Harvard didn't officially allow woman students.
I wrote this little profile to mark the 100th anniversary of her thesis:
Her PhD thesis basically established the Harvard astro department — at a time when Harvard didn't officially allow woman students.
I wrote this little profile to mark the 100th anniversary of her thesis:
September 12, 2025 at 1:14 PM
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
John Forbes - ISOs are ejected from their host systems with a range of velocities, spreading out into tidal streams. The Sun is inside million and billions of ISO streams. The streams make enable multiple ISOs for the same star to enter a plenary system (but low probability) #EPSCDPS2025
September 12, 2025 at 9:14 AM
John Forbes - ISOs are ejected from their host systems with a range of velocities, spreading out into tidal streams. The Sun is inside million and billions of ISO streams. The streams make enable multiple ISOs for the same star to enter a plenary system (but low probability) #EPSCDPS2025
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
@chrislintott.bsky.social kicks off the “interstellar objects” session with an interesting discussion of how the orbits can link to potential sources of stellar populations, which gives us us context for their potential chemistry #epscdps2025 #epscdps
September 12, 2025 at 8:15 AM
@chrislintott.bsky.social kicks off the “interstellar objects” session with an interesting discussion of how the orbits can link to potential sources of stellar populations, which gives us us context for their potential chemistry #epscdps2025 #epscdps
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
Trying to steal a phrase from the exoplanet people: to know the interstellar object population you need to understand the Milky Way: know thy galaxy, know thy ISO.
Chris Lintott (@chrislintott.bsky.social) talking about the Ōtautahi-Oxford model - "know thy galaxy, know thy ISO" - ISOs outlive their parent stars, so we need the sine morte stellar population. #EPSCDPS2025
September 12, 2025 at 8:16 AM
Trying to steal a phrase from the exoplanet people: to know the interstellar object population you need to understand the Milky Way: know thy galaxy, know thy ISO.
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
Have interstellar objects ever hit Earth? No confirmed instances based on fireball statistics but intriguing hints. Dusan Marčeta explores the possibilities with a simulation and it could happen! #epscdps #epscdps2025
September 12, 2025 at 8:38 AM
Have interstellar objects ever hit Earth? No confirmed instances based on fireball statistics but intriguing hints. Dusan Marčeta explores the possibilities with a simulation and it could happen! #epscdps #epscdps2025
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
At #EPSCDPS2025 I've met @plutokiller.com, who discovered Eris and proposed Planet Nine! I've already interacted with him for my book about missing planets, but it has been a pleasure to meet him by person!
September 12, 2025 at 8:40 AM
At #EPSCDPS2025 I've met @plutokiller.com, who discovered Eris and proposed Planet Nine! I've already interacted with him for my book about missing planets, but it has been a pleasure to meet him by person!
Love a good "looking for a job!" slide at the end of a presentation 😁
(Slightly edited to remove a QR code; contact Marielle directly if you have a job for her :D)
#EPSCDPS2025
(Slightly edited to remove a QR code; contact Marielle directly if you have a job for her :D)
#EPSCDPS2025
September 11, 2025 at 8:50 AM
Love a good "looking for a job!" slide at the end of a presentation 😁
(Slightly edited to remove a QR code; contact Marielle directly if you have a job for her :D)
#EPSCDPS2025
(Slightly edited to remove a QR code; contact Marielle directly if you have a job for her :D)
#EPSCDPS2025
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
some interesting results from #JWST in the outer solar system in an absolutely packed room. Who put the session on the biggest, best new space telescope in the smallest room? 😅
#EPSCDPS #EPSCDPS2025.
#EPSCDPS #EPSCDPS2025.
September 11, 2025 at 8:26 AM
some interesting results from #JWST in the outer solar system in an absolutely packed room. Who put the session on the biggest, best new space telescope in the smallest room? 😅
#EPSCDPS #EPSCDPS2025.
#EPSCDPS #EPSCDPS2025.
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
Mike Kelley describes spectra of the icy surface of comet Hale-Bopp, taken at a distance of 46 AU (!!) with JWST 🔭 : similar to Water-type TNOs but with organic features
September 11, 2025 at 8:35 AM
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
Colin Orion Chandler talks up the NSF-DOE Rubin Observatory 🔭 potential for comets, which is - of course - amazing #epscdps2025 #epscdps @vrubinobs.bsky.social
September 10, 2025 at 9:02 AM
Colin Orion Chandler talks up the NSF-DOE Rubin Observatory 🔭 potential for comets, which is - of course - amazing #epscdps2025 #epscdps @vrubinobs.bsky.social
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
Day 4 of #EPSCDPS #EPSCDPS2025. Kicking off with some cool #JWST talks with some #comets stuff tucked into the afternoon session.
We are also displaying a poster on the new 💎 #OpenAccess #PlanetaryScience journal #PlanetaryResearch today. I'll be there in Lampio foyer from 18.00
We are also displaying a poster on the new 💎 #OpenAccess #PlanetaryScience journal #PlanetaryResearch today. I'll be there in Lampio foyer from 18.00
September 11, 2025 at 6:00 AM
Day 4 of #EPSCDPS #EPSCDPS2025. Kicking off with some cool #JWST talks with some #comets stuff tucked into the afternoon session.
We are also displaying a poster on the new 💎 #OpenAccess #PlanetaryScience journal #PlanetaryResearch today. I'll be there in Lampio foyer from 18.00
We are also displaying a poster on the new 💎 #OpenAccess #PlanetaryScience journal #PlanetaryResearch today. I'll be there in Lampio foyer from 18.00
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
🔭 The Umbra of Earth
Image Credit & Copyright: Wang Letian (Eyes at Night)
apod.nasa.gov/apod/ap25091...
Image Credit & Copyright: Wang Letian (Eyes at Night)
apod.nasa.gov/apod/ap25091...
September 11, 2025 at 8:00 AM
🔭 The Umbra of Earth
Image Credit & Copyright: Wang Letian (Eyes at Night)
apod.nasa.gov/apod/ap25091...
Image Credit & Copyright: Wang Letian (Eyes at Night)
apod.nasa.gov/apod/ap25091...
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
So I found a neat rock
September 10, 2025 at 3:25 PM
So I found a neat rock
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
Silvia Protopapa talks about first JWST methane gas detection on dwarf planet Makemake. Third large KBO body with volatile release (Pluto and Triton - it's a captured dwarf planet orbiting Neptune are the other two). This is either an expanding coma or a bound atmosphere! Wow! #EPSCDPS2025
September 10, 2025 at 2:45 PM
Silvia Protopapa talks about first JWST methane gas detection on dwarf planet Makemake. Third large KBO body with volatile release (Pluto and Triton - it's a captured dwarf planet orbiting Neptune are the other two). This is either an expanding coma or a bound atmosphere! Wow! #EPSCDPS2025
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
Fundamentally the #Mars announcement NASA is making today boils down to: there could have been some chemical reactions in these ancient rocks that could have been mediated by living organisms. The word "could" is doing a LOT of heavy lifting there. 🧪
September 10, 2025 at 2:57 PM
Fundamentally the #Mars announcement NASA is making today boils down to: there could have been some chemical reactions in these ancient rocks that could have been mediated by living organisms. The word "could" is doing a LOT of heavy lifting there. 🧪
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
Teddy Kareta talking about P/2023 V6 - it looks like activity shut off sometime in late 2024. See a point source in HST. Wasn’t expect V6 to shut off nor be small. This means that we might be able to see progenitors of Jupiter impactors before they happen with the LSST #EPSCDPS2025
September 9, 2025 at 3:08 PM
Teddy Kareta talking about P/2023 V6 - it looks like activity shut off sometime in late 2024. See a point source in HST. Wasn’t expect V6 to shut off nor be small. This means that we might be able to see progenitors of Jupiter impactors before they happen with the LSST #EPSCDPS2025
A fun little bit of Tuesday morning making a Solar System keychain at the @europlanetmedia.bsky.social Regional Hubs stall with Thibaut Roger!! 😁☀️🌍🌕🔴🪐☄️ #EPSCDPS2025
(the larger black one in the middle is the asteroid belt, the white one at the end the comet reservoir :D also spot the Moon!)
(the larger black one in the middle is the asteroid belt, the white one at the end the comet reservoir :D also spot the Moon!)
September 9, 2025 at 7:35 AM
A fun little bit of Tuesday morning making a Solar System keychain at the @europlanetmedia.bsky.social Regional Hubs stall with Thibaut Roger!! 😁☀️🌍🌕🔴🪐☄️ #EPSCDPS2025
(the larger black one in the middle is the asteroid belt, the white one at the end the comet reservoir :D also spot the Moon!)
(the larger black one in the middle is the asteroid belt, the white one at the end the comet reservoir :D also spot the Moon!)
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
WOOHOO There is a candidate mission to go to the asteroid Apophis! I'm listening to a press conference from EPSC-DPS in Helsinki where ESA is sharing about their RAMSES Mission to Characterize this asteroid that will not hit earth bit will get really damn close.
September 8, 2025 at 1:37 PM
WOOHOO There is a candidate mission to go to the asteroid Apophis! I'm listening to a press conference from EPSC-DPS in Helsinki where ESA is sharing about their RAMSES Mission to Characterize this asteroid that will not hit earth bit will get really damn close.
Starting #EPSCDPS2025 in style by enjoying a total lunar eclipse in Helsinki 🔴🌕
It was a bit of a wait for it to clear the haze, and I think I might have been the first one in the group to spot its dim glow when it did 😎
It was a bit of a wait for it to clear the haze, and I think I might have been the first one in the group to spot its dim glow when it did 😎
September 8, 2025 at 1:04 PM
Starting #EPSCDPS2025 in style by enjoying a total lunar eclipse in Helsinki 🔴🌕
It was a bit of a wait for it to clear the haze, and I think I might have been the first one in the group to spot its dim glow when it did 😎
It was a bit of a wait for it to clear the haze, and I think I might have been the first one in the group to spot its dim glow when it did 😎
Reposted by Dr Rok Nežič 🇸🇮🇬🇧
Looks like the clouds parted at #EPSCDPS2025 just in time for the #LunarEclipse!
September 7, 2025 at 6:51 PM
Looks like the clouds parted at #EPSCDPS2025 just in time for the #LunarEclipse!