EVSN - Lightweight Mars-sized Planet Found in TESS Data
Release Date: 07/11/2025
Actual Astronomy - Observer’s Calendar For September
The 365 Days of Astronomy
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan. - Sept 1 - Aurigids ZHR=10 related to Comet Keiss The comet was discovered by Carl Clarence Kiess at Lick Observatory on a photographic plate obtained in the morning hours of 6 July 1911 with the Crocker photographic telescope. The comet appeared as a distorted nebulous object with a short tail. The presence of the comet was confirmed visually the next day. The comet had a well condensed nucleus and a faint tail. In photographs the tail was four degrees long. The comet then was of seventh magnitude and moving...
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Cheap Astronomy - Dear Cheap Astro Ep. 123: The Big Questions
The 365 Days of Astronomy
Asking questions and not always answering them. Is there hope? Well, sure. The question arises where the Drake Equation, aiming to quantify the likely number of detectable intelligent civilizations out there includes a term representing the inherent risk of any intelligent civilization destroying itself. It is just a risk, could be low could be high, but its wide acceptance as a part of the whole equation does suggest we have some pessimism about our own future. Could dark matter be black holes? Well, no. Firstly. we've discussed before how black holes can't really be dark matter. Dark...
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Exoplanet Radio Ep. 41: Exoplanet Secondary Eclipses: Catching a Planet in the Shadows
The 365 Days of Astronomy
Hosted by Tony Darnell. From Oct 11, 2023. Over the course of this show, we’ve talked many, many times about the Transit Method for detecting exoplanets. It is simply the measure of a star's decrease in brightness as the star passes through our line of sight. This once difficult measurement has now become commonplace and can even be done with advanced amateur astronomy equipment under a reasonably dark sky. From this measurement, we can infer a few things about the planets passing by: we can get an indication of its size and if we measure several transits, we can...
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Astronomy Cast Ep. 126: From Skeptics Guide With Questions
The 365 Days of Astronomy
From February 9, 2009. This week Bob Novella of the Skeptics Guide to the Universe podcast is going to pepper Pamela with questions, testing her ability to leap from tides to gravitational waves to Higgs bosons. We’ll see where this takes us on this skeptical journey through what is known and what we’re trying to learn about this Universe. [Editor’s note: A small bit of audio at the start of two of Bob’s questions was lost due to a technical glitch. So I inserted a coo-coo clock sound effect. Things were going coo-coo after all…] We've added a new way to donate to 365 Days of...
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Travelers in the Night Eps. 327 & 328: Suddenly Bright & The Heat is On
The 365 Days of Astronomy
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. From October & November 2024. Today's 2 topics: - An example that a relatively large space rock can approach the Earth suddenly started with what appeared as a bright star moving across the images that I had just obtained with the Catalina Sky Survey's 60 inch telescope on Mt. Lemmon, Arizona. It was about 100 times brighter than most of Earth approaching objects asteroid hunters discover. Over the next 64 hours it was...
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UNAWE Space Scoop - A Mysterious Notification From a Dying Massive Star
The 365 Days of Astronomy
In January 2025, astronomers woke up to an alert of a mysterious event that occurred 2.8 billion light years away from Earth. As such things go, this was fairly close to Earth and was an opportunity for detailed observation of the event’s evolution. It was a powerful burst of X-rays, known as a fast X-ray transient or FXT. This burst was named ‘EP 250108a’, after the Einstein Probe, that’s the EP part, that detected the event. Let’s call it 108a. Just between us… FXTs are generally hard to detect and occur far from the Earth. They only last between a few seconds to a...
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EVSN - Dual Quasars, Tidal Disruption Events & a Halo For Andromeda
The 365 Days of Astronomy
From August 31, 2020. Join us today as we examine observations for dual quasars in the process of merging and a star being torn apart by its supermassive black hole. Plus, Hubble data used to map a halo around the Andromeda galaxy. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you! ------------------------------------ Do go visit for cool Astronomy Cast and CosmoQuest...
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Space Stories - Galaxies Don’t Crash, They Remix
The 365 Days of Astronomy
Hosted by our Director, Avivah Yamani. Today's podcast guides you through the slow-motion meeting of the Milky Way and Andromeda. Learn why stars mostly miss each other, how gravity sculpts tidal tails, and how colliding gas and dust spark starbursts—turning two spirals into one remixed galaxy. Epic? Yes. Doomsday? Nope. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you!...
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Guide to Space - An Intermediate Mass Black Hole Found in the Milky Way. 100,000 Times the Mass of the Sun
The 365 Days of Astronomy
From Sep 8, 2017. Astronomers have been searching for mid-weight black holes, and now they’ve found one, right here in the Milky Way. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you! ------------------------------------ Do go visit for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your...
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Deep Astronomy - A Journey into a Black Hole Collision
The 365 Days of Astronomy
Hosted by Tony Darnell. From Apr 26, 2016. Black holes have been largely theoretical until the LIGO observations announced earlier this year. Thanks to those observations, we now have another way to study and observe these amazing celestial objects. Original Music by Mark C. Petersen, Loch Ness Productions We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank...
info_outlineFrom December 3, 2021.
A Mars-sized planet was found just 31 light-years away, orbiting its star every eight hours and having 55 percent the mass of the Earth, leading scientists to conclude it’s mostly made of an iron-nickel core. Plus, water on Earth, a huge comet, and a review of a Canon lens.
We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.
Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can!
Share the podcast with your friends and send the Patreon link to them too!
Every bit helps! Thank you!
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The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu
Visit us on the web at 365DaysOfAstronomy.org or email us at [email protected].