Joel Parker
@joel-parker.bsky.social
astronomer, scientist on space missions (New Horizons, Rosetta, Lucy), actor, drummer, bike commuter, host/producer for How on Earth show, hubby & dad
Reposted by Joel Parker
Are you ready to explore the known, unknown, and possibly unknowable with @profkelsey.bsky.social? We talk about her book Into The Unknown: The Quest to Understand the Mysteries of the Cosmos. Part 1 of the interview aired this week howonearthradio.org/archives/10317
Join us for Part 2 next week.
Join us for Part 2 next week.
Into The Unknown (Part 1)
Into The Unknown (starts at 7:57) What do we know about the universe, and how do we know we know it? Conversely, what do we know we don’t know, what don’t we know that we don’t know, and why not? T…
howonearthradio.org
October 25, 2025 at 9:25 PM
Are you ready to explore the known, unknown, and possibly unknowable with @profkelsey.bsky.social? We talk about her book Into The Unknown: The Quest to Understand the Mysteries of the Cosmos. Part 1 of the interview aired this week howonearthradio.org/archives/10317
Join us for Part 2 next week.
Join us for Part 2 next week.
Reposted by Joel Parker
This week we hear from science journalist Miles O'Brien about breaking in to science journalism, past and current science reporting, public and political views of science, and the value of scientific research. We also look at claims about acetaminophen and autism. howonearthradio.org/archives/10283
Science Journalism with Miles O’Brien // Acetaminophen and Autism
This episode features Miles O’Brien, a science journalist who has been a correspondent for PBS News and CNN. He talks about his experience breaking in to science journalism, past and current …
howonearthradio.org
September 30, 2025 at 3:16 PM
This week we hear from science journalist Miles O'Brien about breaking in to science journalism, past and current science reporting, public and political views of science, and the value of scientific research. We also look at claims about acetaminophen and autism. howonearthradio.org/archives/10283
Reposted by Joel Parker
howonearthradio.org/archives/10122
This week we talk with two climate scientists about 100 Hours to Save America’s Forecasts (wclivestream.com), a marathon event starting May 28, featuring meteorologists and climate scientists from across the US who share their work and show what makes it so vital.
This week we talk with two climate scientists about 100 Hours to Save America’s Forecasts (wclivestream.com), a marathon event starting May 28, featuring meteorologists and climate scientists from across the US who share their work and show what makes it so vital.
Saving Weather Forecasting, Climate Science
Scientists speak out for science (start time: 1:00) The Trump administration has been on a dizzying streak of slashing federal funding for scientific research, and firing thousands of federal scien…
howonearthradio.org
May 28, 2025 at 3:21 AM
howonearthradio.org/archives/10122
This week we talk with two climate scientists about 100 Hours to Save America’s Forecasts (wclivestream.com), a marathon event starting May 28, featuring meteorologists and climate scientists from across the US who share their work and show what makes it so vital.
This week we talk with two climate scientists about 100 Hours to Save America’s Forecasts (wclivestream.com), a marathon event starting May 28, featuring meteorologists and climate scientists from across the US who share their work and show what makes it so vital.
Reposted by Joel Parker
Graduation season! That means it is time for our annual Graduation Special on #KGNU, where we talk to grad students about their thesis work. Part 1 is about spacecraft trajectories, Bell tests, and Level-Set Topology Optimization.
howonearthradio.org/archives/10070
howonearthradio.org/archives/10070
2025 Graduation Special (part 1)
With graduation season upon us, today’s edition of How on Earth is Part 1 of our annual “Graduation Special”. Our guests in the studio today are scientists and engineers who have or will soon recei…
howonearthradio.org
May 7, 2025 at 2:32 PM
Graduation season! That means it is time for our annual Graduation Special on #KGNU, where we talk to grad students about their thesis work. Part 1 is about spacecraft trajectories, Bell tests, and Level-Set Topology Optimization.
howonearthradio.org/archives/10070
howonearthradio.org/archives/10070
Reposted by Joel Parker
Today on How on Earth #KGNU, we talk with Dr. Simone Marchi about #NASA's #LucyMission to the Trojan asteroids. On its way, Lucy has flybys of two main-belt asteroids: Dinkinesh in November 2023 and next on April 20 it will fly by asteroid Donaldjohanson. howonearthradio.org/archives/10036
The Lucy Mission
Our guest today is Dr. Simone Marchi, Institute Scientist in the Solar System Science & Exploration Division at the Boulder office of Southwest Research Institute. Dr. Marchi is the Deputy Prin…
howonearthradio.org
April 15, 2025 at 10:16 PM
Today on How on Earth #KGNU, we talk with Dr. Simone Marchi about #NASA's #LucyMission to the Trojan asteroids. On its way, Lucy has flybys of two main-belt asteroids: Dinkinesh in November 2023 and next on April 20 it will fly by asteroid Donaldjohanson. howonearthradio.org/archives/10036
Reposted by Joel Parker
For this week's episode of How on Earth on KGNU, we share a little foolishness - Professor Angus Gillespie reflects on the history of April Fools' Day, and Dr. Mike Lund (@lowbacca.bsky.social) talks about the tradition of April Fool Astronomy papers.
howonearthradio.org/archives/10019
howonearthradio.org/archives/10019
April Foolish Science
Today is April Fools’ day, when jokes and pranks are played, sometimes among friends and family, sometimes on a more public scale. But why is there such a day for culturally-accepted foolishness? …
howonearthradio.org
April 2, 2025 at 5:24 PM
For this week's episode of How on Earth on KGNU, we share a little foolishness - Professor Angus Gillespie reflects on the history of April Fools' Day, and Dr. Mike Lund (@lowbacca.bsky.social) talks about the tradition of April Fool Astronomy papers.
howonearthradio.org/archives/10019
howonearthradio.org/archives/10019
A solar eclipse...as seen from the Moon.
Imagine standing there, looking back at Earth as it passes in front of the Sun.
fireflyspace.com/news/blue-gh...
Imagine standing there, looking back at Earth as it passes in front of the Sun.
fireflyspace.com/news/blue-gh...
March 15, 2025 at 2:06 AM
A solar eclipse...as seen from the Moon.
Imagine standing there, looking back at Earth as it passes in front of the Sun.
fireflyspace.com/news/blue-gh...
Imagine standing there, looking back at Earth as it passes in front of the Sun.
fireflyspace.com/news/blue-gh...
Reposted by Joel Parker
Our recent show is a look back at some forward-looking science stories from 2024:
* Tom Cech Talks RNA - the catalyst
* Avian Flu
* Artificial Intelligence
* Colorado, the Quantum State
howonearthradio.org/archives/9892
@KGNU
* Tom Cech Talks RNA - the catalyst
* Avian Flu
* Artificial Intelligence
* Colorado, the Quantum State
howonearthradio.org/archives/9892
@KGNU
Science Stories from 2024
We share the How on Earth team’s picks for of science stories of 2024: Tom Cech Talks RNA (starts at 1:56) Avian Flu (starts at 9:33) Artificial Intelligence (starts at 13:13) Colorado, the …
howonearthradio.org
January 5, 2025 at 12:33 AM
Our recent show is a look back at some forward-looking science stories from 2024:
* Tom Cech Talks RNA - the catalyst
* Avian Flu
* Artificial Intelligence
* Colorado, the Quantum State
howonearthradio.org/archives/9892
@KGNU
* Tom Cech Talks RNA - the catalyst
* Avian Flu
* Artificial Intelligence
* Colorado, the Quantum State
howonearthradio.org/archives/9892
@KGNU
Full disclosure: to be clear, yes, this mission isn’t specifically not named after someone other than me.
blogs.nasa.gov/parkersolarp...
blogs.nasa.gov/parkersolarp...
NASA’s Parker Solar Probe Reports Successful Closest Approach to Sun – Parker Solar Probe
blogs.nasa.gov
December 27, 2024 at 2:29 PM
Full disclosure: to be clear, yes, this mission isn’t specifically not named after someone other than me.
blogs.nasa.gov/parkersolarp...
blogs.nasa.gov/parkersolarp...
This recently-posted interview is from May during #Starmus in Bratislava. It was a lot of fun talking about life, the universe, and everything with Norbert Werner and Samuel Kováčik as a part of their Conversations about the Cosmos series.
www.youtube.com/watch?v=mjfB...
www.youtube.com/watch?v=mjfB...
Rozhovory o vesmíru s Joelem Parkerem (EN s SK titulky)
YouTube video by Ústav teoretické fyziky a astrofyziky PřF MU
www.youtube.com
December 2, 2024 at 12:04 AM
This recently-posted interview is from May during #Starmus in Bratislava. It was a lot of fun talking about life, the universe, and everything with Norbert Werner and Samuel Kováčik as a part of their Conversations about the Cosmos series.
www.youtube.com/watch?v=mjfB...
www.youtube.com/watch?v=mjfB...
Just tried importing all my past tweets with Porto, but they didn't keep the original timestamp. Looking for a do-over. Any suggestions for a better migration tool that preserves original timestamps?
December 1, 2024 at 8:19 PM
Just tried importing all my past tweets with Porto, but they didn't keep the original timestamp. Looking for a do-over. Any suggestions for a better migration tool that preserves original timestamps?
This Thanksgiving, as every Thanksgiving the past few decades, I'm thankful with great gratitude for my families - the one I grew up with and the one I grew around me. I'm thankful for friends, health, art, nature, and the opportunity of work that pays me to explore the mysteries of the universe.
November 29, 2024 at 4:07 AM
This Thanksgiving, as every Thanksgiving the past few decades, I'm thankful with great gratitude for my families - the one I grew up with and the one I grew around me. I'm thankful for friends, health, art, nature, and the opportunity of work that pays me to explore the mysteries of the universe.
Happy 50th anniversary of the Lucy fossil. Well, 50th of the discovery...about 3,200,000th anniversary of Lucy herself.
lucy.swri.edu/50_years_of_...
lucy.swri.edu/50_years_of_...
Happy 50th anniversary, Lucy!
50 years ago yesterday, Donald Johanson and his team discovered the fossilized remains of a human ancestor that would come to be known by the nickname Lucy.
lucy.swri.edu
November 29, 2024 at 4:01 AM
Happy 50th anniversary of the Lucy fossil. Well, 50th of the discovery...about 3,200,000th anniversary of Lucy herself.
lucy.swri.edu/50_years_of_...
lucy.swri.edu/50_years_of_...
A couple takes on an oldie but goodie:
December 1, 2024 at 7:58 PM
A couple takes on an oldie but goodie:
I greatly appreciate the talks at #AAS242 that take the time to give acknowledgment (with photos) and thanks to the grad students, postdocs, and other early career scientists who worked on the project, their own experience with supportive mentors, and the importance of mentoring.
December 1, 2024 at 7:58 PM
I greatly appreciate the talks at #AAS242 that take the time to give acknowledgment (with photos) and thanks to the grad students, postdocs, and other early career scientists who worked on the project, their own experience with supportive mentors, and the importance of mentoring.
Organizing negatives of photos of hats.
#JobsIveHad
#JobsIveHad
December 1, 2024 at 7:58 PM
Organizing negatives of photos of hats.
#JobsIveHad
#JobsIveHad
Useful:
1 day = 86400 seconds
1 million seconds ~ 12 days
1 billion seconds ~ 32 years
1 million minutes ~ 2 years
1000 days ~ 3 years
1 year ~ pi x 10 million seconds
1 cubic mile ~ 1 trillion gallons
1 gallon water ~ 8 pounds
speed of light ~ 1 foot per nanosecond
1 day = 86400 seconds
1 million seconds ~ 12 days
1 billion seconds ~ 32 years
1 million minutes ~ 2 years
1000 days ~ 3 years
1 year ~ pi x 10 million seconds
1 cubic mile ~ 1 trillion gallons
1 gallon water ~ 8 pounds
speed of light ~ 1 foot per nanosecond
December 1, 2024 at 7:58 PM
Useful:
1 day = 86400 seconds
1 million seconds ~ 12 days
1 billion seconds ~ 32 years
1 million minutes ~ 2 years
1000 days ~ 3 years
1 year ~ pi x 10 million seconds
1 cubic mile ~ 1 trillion gallons
1 gallon water ~ 8 pounds
speed of light ~ 1 foot per nanosecond
1 day = 86400 seconds
1 million seconds ~ 12 days
1 billion seconds ~ 32 years
1 million minutes ~ 2 years
1000 days ~ 3 years
1 year ~ pi x 10 million seconds
1 cubic mile ~ 1 trillion gallons
1 gallon water ~ 8 pounds
speed of light ~ 1 foot per nanosecond
I'm looking for a video of the lunar eclipse, ideally showing from fully-lit moon to totality.
December 1, 2024 at 7:58 PM
I'm looking for a video of the lunar eclipse, ideally showing from fully-lit moon to totality.
December 1, 2024 at 7:58 PM