Caltech Astro
@caltechastro.bsky.social
Follow me to keep up to date on Caltech Astronomy Outreach events!
http://outreach.astro.caltech.edu
http://outreach.astro.caltech.edu
Last weekend, we hosted the City of Astronomy Science Festival. We partnered with many other institutions across Pasadena to host science demos and presentations over the day. We had a blast interacting with the 1,000+ attendees who joined. Thanks to everyone who attended!
November 19, 2025 at 11:51 PM
Last weekend, we hosted the City of Astronomy Science Festival. We partnered with many other institutions across Pasadena to host science demos and presentations over the day. We had a blast interacting with the 1,000+ attendees who joined. Thanks to everyone who attended!
We partnered with Garfield High School in East LA last week to help with their Astronomy Night. Despite some clouds, we were still able to see Saturn and the Andromeda Galaxy, as well talk about the Moon and black holes with and enthusiastic bunch of students! Thanks for hosting!
November 18, 2025 at 7:53 PM
We partnered with Garfield High School in East LA last week to help with their Astronomy Night. Despite some clouds, we were still able to see Saturn and the Andromeda Galaxy, as well talk about the Moon and black holes with and enthusiastic bunch of students! Thanks for hosting!
A planet was recently detected orbiting the nearest star system to Earth, Alpha Centauri. Caltech Astro PhD student Aniket Sanghi, one of the lead scientists who made this discovery, recently gave a presentation at Astronomy on Tap, now on YouTube:
www.youtube.com/watch?v=oMcG...
www.youtube.com/watch?v=oMcG...
November 14, 2025 at 10:46 PM
A planet was recently detected orbiting the nearest star system to Earth, Alpha Centauri. Caltech Astro PhD student Aniket Sanghi, one of the lead scientists who made this discovery, recently gave a presentation at Astronomy on Tap, now on YouTube:
www.youtube.com/watch?v=oMcG...
www.youtube.com/watch?v=oMcG...
What will we discover with the world's most powerful radio telescope? Last week, Professor Gregg Hallinan taught us all about the DSA, a new telescope being built in remote Nevada and what it will mean for the future of astronomy! Now on YouTube:
www.youtube.com/watch?v=7cnN...
www.youtube.com/watch?v=7cnN...
November 10, 2025 at 8:38 PM
What will we discover with the world's most powerful radio telescope? Last week, Professor Gregg Hallinan taught us all about the DSA, a new telescope being built in remote Nevada and what it will mean for the future of astronomy! Now on YouTube:
www.youtube.com/watch?v=7cnN...
www.youtube.com/watch?v=7cnN...
Join us to learn why Pasadena is the "City of Astronomy" for a free afternoon of science demonstrations, solar telescopes, and public-level presentations on black holes, exoplanets, galaxies, space weather, and AI!
Sunday, November 16 Noon-4PM
www.cityofastronomy.org
Sunday, November 16 Noon-4PM
www.cityofastronomy.org
November 7, 2025 at 6:49 PM
Join us to learn why Pasadena is the "City of Astronomy" for a free afternoon of science demonstrations, solar telescopes, and public-level presentations on black holes, exoplanets, galaxies, space weather, and AI!
Sunday, November 16 Noon-4PM
www.cityofastronomy.org
Sunday, November 16 Noon-4PM
www.cityofastronomy.org
How can we build a star here on Earth? How does the fourth state of matter, plasma, behave? This week, we are hosting two Astronomy on Tap events all about plasma physics: Monday, November 17th and Thursday, November 20th at 7:30PM
outreach.astro.caltech.edu
outreach.astro.caltech.edu
November 4, 2025 at 6:16 PM
How can we build a star here on Earth? How does the fourth state of matter, plasma, behave? This week, we are hosting two Astronomy on Tap events all about plasma physics: Monday, November 17th and Thursday, November 20th at 7:30PM
outreach.astro.caltech.edu
outreach.astro.caltech.edu
Rockstars Jason Achilles and Forrest Mitchell came out to our Astronomy on Tap this week in costume as Han Solo and Chewbacca. Many thanks to these legends for performing at so many of our events throughout the year! Happy Halloween, everyone!
October 31, 2025 at 8:46 PM
Rockstars Jason Achilles and Forrest Mitchell came out to our Astronomy on Tap this week in costume as Han Solo and Chewbacca. Many thanks to these legends for performing at so many of our events throughout the year! Happy Halloween, everyone!
How are scientists working to find worlds possibly hosting life, like Pandora from the movie Avatar? Caltech scientist Katelyn Horstman explains these efforts and more at our recent Astronomy on Tap! Her presentation is now up on our YouTube channel:
www.youtube.com/watch?v=K-X-...
www.youtube.com/watch?v=K-X-...
October 31, 2025 at 7:51 PM
How are scientists working to find worlds possibly hosting life, like Pandora from the movie Avatar? Caltech scientist Katelyn Horstman explains these efforts and more at our recent Astronomy on Tap! Her presentation is now up on our YouTube channel:
www.youtube.com/watch?v=K-X-...
www.youtube.com/watch?v=K-X-...
Last weekend, we joined the California Dark Sky Festival near Death Valley NP. We helped operate telescopes, did science demonstrations, hosted an Astrophysicist Q&A Panel, and gave lectures on "Black Holes", "Space Exploration", and "The Formation of the Solar System".
October 23, 2025 at 10:07 PM
Last weekend, we joined the California Dark Sky Festival near Death Valley NP. We helped operate telescopes, did science demonstrations, hosted an Astrophysicist Q&A Panel, and gave lectures on "Black Holes", "Space Exploration", and "The Formation of the Solar System".
Images of Comet C/2025 A6 (Lemmon) shot from Panamint Valley over the weekend at the California Dark Sky Festival by Caltech Astro PhD student Advait Mehla.
October 21, 2025 at 5:00 PM
Images of Comet C/2025 A6 (Lemmon) shot from Panamint Valley over the weekend at the California Dark Sky Festival by Caltech Astro PhD student Advait Mehla.
What does the sky look like in radio light? What will we learn about stars, galaxies, and black holes using the DSA-2000, a revolutionary new radio telescope being built in the remote Nevada desert? Join us at our next Stargazing Lecture, Friday Nov 7!
outreach.astro.caltech.edu
outreach.astro.caltech.edu
October 10, 2025 at 11:49 PM
What does the sky look like in radio light? What will we learn about stars, galaxies, and black holes using the DSA-2000, a revolutionary new radio telescope being built in the remote Nevada desert? Join us at our next Stargazing Lecture, Friday Nov 7!
outreach.astro.caltech.edu
outreach.astro.caltech.edu
Last Friday, we learned all about asteroids and what threats they pose to humanity at our Stargazing Lecture by Dr. Joe Masiero. His excellent presentation is now up on our YouTube channel here:
www.youtube.com/watch?v=35_d...
www.youtube.com/watch?v=35_d...
October 6, 2025 at 6:05 PM
Last Friday, we learned all about asteroids and what threats they pose to humanity at our Stargazing Lecture by Dr. Joe Masiero. His excellent presentation is now up on our YouTube channel here:
www.youtube.com/watch?v=35_d...
www.youtube.com/watch?v=35_d...
Recently, we hosted two special Astronomy on Tap nights at the Great Basin Astronomy Festival in Eastern Nevada. Great Basin has the darkest skies of any national park in the contiguous USA, so the stargazing was incredible and the telescopes were out!
September 30, 2025 at 10:47 PM
Recently, we hosted two special Astronomy on Tap nights at the Great Basin Astronomy Festival in Eastern Nevada. Great Basin has the darkest skies of any national park in the contiguous USA, so the stargazing was incredible and the telescopes were out!
What do we know about planets outside of our solar system? Are there really planets orbiting the nearest star system to ours, Alpha Centauri? Join us Monday, October 27th at 7:30PM for to learn more at Astronomy on Tap!
outreach.astro.caltech.edu/aot
outreach.astro.caltech.edu/aot
September 29, 2025 at 10:01 PM
What do we know about planets outside of our solar system? Are there really planets orbiting the nearest star system to ours, Alpha Centauri? Join us Monday, October 27th at 7:30PM for to learn more at Astronomy on Tap!
outreach.astro.caltech.edu/aot
outreach.astro.caltech.edu/aot
This summer, Caltech Astro partnered with the Nevada Northern Railway and DSA-2000 to assist with "Star Train", a series of evening railway journeys into the dark skies of the Nevada desert featuring astronomy education, stargazing and telescopes. nnry.com/train-rides/
September 23, 2025 at 10:39 PM
This summer, Caltech Astro partnered with the Nevada Northern Railway and DSA-2000 to assist with "Star Train", a series of evening railway journeys into the dark skies of the Nevada desert featuring astronomy education, stargazing and telescopes. nnry.com/train-rides/
"People who think about living on Mars, haven't thought enough about living on Mars." Dr. Adam Steltzner, Chief Engineer of the NASA Mars Perseverance Rover program just gave a wonderful presentation on Mars at Astro on Tap which is now on YouTube:
www.youtube.com/watch?v=p3Ch...
www.youtube.com/watch?v=p3Ch...
September 19, 2025 at 5:25 PM
"People who think about living on Mars, haven't thought enough about living on Mars." Dr. Adam Steltzner, Chief Engineer of the NASA Mars Perseverance Rover program just gave a wonderful presentation on Mars at Astro on Tap which is now on YouTube:
www.youtube.com/watch?v=p3Ch...
www.youtube.com/watch?v=p3Ch...
Last weekend, we helped out at the Sequoia Dark Sky Festival in Sequoia National Park. Our group gave some public science presentations, operated telescopes at the star party, and hosted an Astrophysicists Q&A Panel to attendees at the festival. We hope to be back next year.
September 18, 2025 at 5:19 PM
Last weekend, we helped out at the Sequoia Dark Sky Festival in Sequoia National Park. Our group gave some public science presentations, operated telescopes at the star party, and hosted an Astrophysicists Q&A Panel to attendees at the festival. We hope to be back next year.
Join us this weekend at the Great Basin Astronomy Festival in Eastern Nevada. The festival will feature public science presentations, Astronomy on Tap events, and stargazing in very dark skies! Free and open to all.
www.nps.gov/grba/planyou...
www.nps.gov/grba/planyou...
September 16, 2025 at 9:48 PM
Join us this weekend at the Great Basin Astronomy Festival in Eastern Nevada. The festival will feature public science presentations, Astronomy on Tap events, and stargazing in very dark skies! Free and open to all.
www.nps.gov/grba/planyou...
www.nps.gov/grba/planyou...
NASA is sending a helicopter to Saturn's moon Titan to fly through its atmosphere and search for signs of life. We recently hosted NASA JPL scientist Dr. Morgan Cable to tell us all about it at Astronomy on Tap, and her talk is now up on YouTube here:
www.youtube.com/watch?v=CeEL...
www.youtube.com/watch?v=CeEL...
September 12, 2025 at 9:38 PM
NASA is sending a helicopter to Saturn's moon Titan to fly through its atmosphere and search for signs of life. We recently hosted NASA JPL scientist Dr. Morgan Cable to tell us all about it at Astronomy on Tap, and her talk is now up on YouTube here:
www.youtube.com/watch?v=CeEL...
www.youtube.com/watch?v=CeEL...
Do you like national parks and astronomy?
Caltech will be helping at Dark Sky Festivals in Sequoia NP and Great Basin NP over the next 2 weekends.
sequoiaparksconservancy.org/dark-sky-fes...
www.nps.gov/grba/planyou...
Both events are free and open to all. We hope to see you at one of them!
Caltech will be helping at Dark Sky Festivals in Sequoia NP and Great Basin NP over the next 2 weekends.
sequoiaparksconservancy.org/dark-sky-fes...
www.nps.gov/grba/planyou...
Both events are free and open to all. We hope to see you at one of them!
September 11, 2025 at 8:34 AM
Do you like national parks and astronomy?
Caltech will be helping at Dark Sky Festivals in Sequoia NP and Great Basin NP over the next 2 weekends.
sequoiaparksconservancy.org/dark-sky-fes...
www.nps.gov/grba/planyou...
Both events are free and open to all. We hope to see you at one of them!
Caltech will be helping at Dark Sky Festivals in Sequoia NP and Great Basin NP over the next 2 weekends.
sequoiaparksconservancy.org/dark-sky-fes...
www.nps.gov/grba/planyou...
Both events are free and open to all. We hope to see you at one of them!
The Owens Valley Radio Observatory (run by Caltech) will host its monthly lecture series this fall on Thursday nights in Bishop, CA. Each event will feature a public-level astronomy presentation and is open to all and totally free! We hope to see you there!
September 10, 2025 at 7:52 PM
The Owens Valley Radio Observatory (run by Caltech) will host its monthly lecture series this fall on Thursday nights in Bishop, CA. Each event will feature a public-level astronomy presentation and is open to all and totally free! We hope to see you there!
We hosted Sam Rose to discuss cosmic fireworks and how our sky changes. Her presentation comprehensively covers the history of this field, including a demonstration of how scientists split light into its constituent colors to understand its origin.
www.youtube.com/watch?v=_4c2...
www.youtube.com/watch?v=_4c2...
September 9, 2025 at 8:36 AM
We hosted Sam Rose to discuss cosmic fireworks and how our sky changes. Her presentation comprehensively covers the history of this field, including a demonstration of how scientists split light into its constituent colors to understand its origin.
www.youtube.com/watch?v=_4c2...
www.youtube.com/watch?v=_4c2...
What are the prospects of people actually living on Mars? How do astronomers use high-altitude balloons to put telescopes nearly into space? Join our next Astronomy on Tap, featuring the NASA JPL Chief Engineer of the Mars Perseverance Rover:
outreach.astro.caltech.edu/aot
outreach.astro.caltech.edu/aot
August 25, 2025 at 11:54 AM
What are the prospects of people actually living on Mars? How do astronomers use high-altitude balloons to put telescopes nearly into space? Join our next Astronomy on Tap, featuring the NASA JPL Chief Engineer of the Mars Perseverance Rover:
outreach.astro.caltech.edu/aot
outreach.astro.caltech.edu/aot
How frequently do comets and asteroids pass near the Earth? How do we detect these objects and ensure they do not pose a threat to us? Join us for a 30-minute lecture followed by guided stargazing with telescopes:
outreach.astro.caltech.edu
outreach.astro.caltech.edu
August 22, 2025 at 1:24 AM
How frequently do comets and asteroids pass near the Earth? How do we detect these objects and ensure they do not pose a threat to us? Join us for a 30-minute lecture followed by guided stargazing with telescopes:
outreach.astro.caltech.edu
outreach.astro.caltech.edu
El viernes pasado por la noche, organizamos una Noche de las Estrellas especial con una presentación pública del Dr. Javier Roulet sobre agujeros negros y ondas gravitacionales, seguida de una observación astronómica guiada con telescopios.
www.youtube.com/watch?v=UZQk...
www.youtube.com/watch?v=UZQk...
August 18, 2025 at 7:17 PM
El viernes pasado por la noche, organizamos una Noche de las Estrellas especial con una presentación pública del Dr. Javier Roulet sobre agujeros negros y ondas gravitacionales, seguida de una observación astronómica guiada con telescopios.
www.youtube.com/watch?v=UZQk...
www.youtube.com/watch?v=UZQk...