The most played episodes among Podcast App listeners.

1. 1
   Number 1: 407E-448-Two PHA's

   The large dangerous asteroids that we don't know about are what keep asteroid hunters going to the telescope.

   September 22, 2026·3min
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2. 2
   Number 2: 406E-447-Nuking An Asteroid

   Tonight, even though the chances are extremely slim, an asteroid hunter could find a sizable asteroid on a collision course with planet Earth. If we have decades warning, the potential impactor's arrival time could be changed by impacting the dangerous object with a high velocity mass or if we have less time we will need to nuke it which will either blow it to bits or give it a rocket like push.

   September 15, 2026·3min
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3. 3
   Number 3: 916-Past Glory

   When accurately recorded historical observations do not agree with what we what we see today it is often very rewarding to find out why. In modern telescopes we see Theta Eridani to a be pair separated by about 425 times our distance from the Sun orbiting a common center of gravity. Detailed observations of the spectrum of one of these show it to be itself a pair of stars orbiting each other every 4.1 days. One of this very close pair, as it is aging, dumps matter onto its companion causing it to brightened significantly. In the past this mass transfer rate was much higher than it is today and the naked eye brightness of Theta Eridani is fainter to us than it was long ago.

   September 11, 2026·3min
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4. 4
   Number 4: 405E-446-Asteroid Homestead

   In the future one can envision a space mining family boarding a descendent of the SpaceX Falcon Heavy Launch Vehicle for a trip into low Earth orbit. A few hundred miles above the Earth's surface they would rendezvous with their asteroid mining spacecraft which will be their home for the next five years or so.

   September 08, 2026·3min
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5. 5
   Number 5: 915-Raining Comets

   The comets we observe generally start out as icy dirty snowballs of frozen gases like water and frozen carbon dioxide in the Oort cloud. If recent scientific analysis is correct, we are now witnessing a parade of comets produced by the passage of a star when our first ancestors began to roam the Earth in Africa.

   September 04, 2026·3min
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