Travelers In The Night

Series produced by Al Grauer

Series image
Image by: NASA 

Travelers In The Night is your unique source of insider Information from the Asteroid Hunting and Space Communities.
The music is "Eternity" by John Lyell.

The PRX Series “Travelers In The Night” has more than 4,600 PRX free purchases as well as more than 663,000 downloads and 33,000 followers on the internet. It has been aired on 54 radio stations.


It features an engaging and informative series of two minute, factual episodes about asteroids, comets, spacecraft, and other objects in space.

The pieces are "evergreen" in that they are current but not dated.

The Travelers In The Night Pieces are written and produced by a member of the Catalina Sky Survey Team at the University of Arizona.

The Catalina Sky Survey has discovered nearly half of the Earth approaching objects known to exist.


677 Pieces

Order by: Newest First | Oldest First
678-Greg's Comet(425)
From: Al Grauer
Series: Travelers In The Night
Caption: Comet Lovejoy, Credit: NASA
Greg's comet comes into our neighborhood once per human lifetime and spends most of it's time in the lonely space high above or far below the rest ...

Bought by KTAL-LP [Las Cruces Community Radio] and Harford Community Radio


  • Added: Jan 22, 2022
  • Length: 02:00
  • Purchases: 2
677-30 Years of Fireballs(457)
From: Al Grauer
Series: Travelers In The Night
Caption: 30 years of fireballs, Credit: NASA
Fireballs are meteors which become brighter than the planet Venus and can sometimes be seen in the daytime. If you are lucky to see a fireball send...

Bought by RADIOLEX, KICI Iowa City, KKRN, WTIP, KRWG and more


  • Added: Jan 16, 2022
  • Length: 02:00
  • Purchases: 7
676-Cloud 7(449)
From: Al Grauer
Series: Travelers In The Night
Caption: Asteroids and Earth, Credit: ESA:P. Carril
To give you an idea of the asteroid traffic in our neighborhood, on a mostly cloudy night, through holes in the clouds, in a space of less than 2 h...

Bought by KICI Iowa City, KRWG, WTIP, KKRN, KTAL-LP [Las Cruces Community Radio] and more


  • Added: Jan 09, 2022
  • Length: 02:00
  • Purchases: 6
675-Nuking An Asteroid(447)
From: Al Grauer
Series: Travelers In The Night
Caption: Artists Conception, Credit: Dan Durda
Tonight, even though the chances are extremely slim, an asteroid hunter could find a sizable asteroid on a collision course with planet Earth. If w...

Bought by KICI Iowa City, RADIOLEX, Harford Community Radio, KRWG, KKRN and more


  • Added: Jan 02, 2022
  • Length: 02:00
  • Purchases: 8
674-Asteroid Homestead(446)
From: Al Grauer
Series: Travelers In The Night
Caption: Asteroid Mining, Credit: NASA
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 orb...

Bought by KICI Iowa City, RADIOLEX, KGLP, KKRN, and KTAL-LP [Las Cruces Community Radio]


  • Added: Dec 25, 2021
  • Length: 02:00
  • Purchases: 5
673-Christmas Comet(437)
From: Al Grauer
Series: Travelers In The Night
Caption: Halley's Comet, Credit: NASA
On December 25, 2017, while searching for Earth approaching asteroids in the constellation of Virgo, the Universe gave my Catalina Sky Survey team...

Bought by WTIP, KKRN, KRWG, KICI Iowa City, and Harford Community Radio


  • Added: Dec 19, 2021
  • Length: 02:00
  • Purchases: 5
672-Meteor Whispers(427)
From: Al Grauer
Series: Travelers In The Night
Caption: Fireball Exploding, Credit: NASA
Recent scientific studies have begun to shed light on the interesting mystery of how the small number of what we now call electrophonic meteors pro...

Bought by KGLP, RADIOLEX, Harford Community Radio, KKRN, KRWG and more


  • Added: Dec 12, 2021
  • Length: 02:00
  • Purchases: 7
671-Long Winter Nights(424)
From: Al Grauer
Series: Travelers In The Night
Caption: Mt. Lemmon, AZ snow storm, Credit: A.D. Grauer
Long Winter nights with good seeing, from start to finish, are those on which the asteroid hunter makes new discoveries while being treated to view...

Bought by KGLP, KICI Iowa City, RADIOLEX, WTIP, KKRN and more


  • Added: Dec 05, 2021
  • Length: 02:00
  • Purchases: 8
670-Laser Surfing(364)
From: Al Grauer
Series: Travelers In The Night
Caption: Laser Sail, Credit: Project Breakthrough
Laser propelled ultra light space probes could be sent to explore nearby worlds.

Bought by KICI Iowa City, RADIOLEX, KGLP, WTIP, KRWG and more


  • Added: Nov 28, 2021
  • Length: 02:00
  • Purchases: 8
669-Seeds(356)
From: Al Grauer
Series: Travelers In The Night
Caption: Voyager Leaving Solar System, Credit: NASA
What plant seeds will be left for interstellar travelers to take with them?

Bought by KICI Iowa City, KGLP, KRZA, RADIOLEX, WTIP and more


  • Added: Nov 21, 2021
  • Length: 02:00
  • Purchases: 9
668-Dry Sands(420)
From: Al Grauer
Series: Travelers In The Night
Caption: Mars, Credit: NASA
Intriguing features which change with the Martian seasons mimic flows of liquid water on the Earth's surface.

Bought by KICI Iowa City, KGLP, RADIOLEX, KRWG, KKRN and more


  • Added: Nov 14, 2021
  • Length: 02:00
  • Purchases: 8
667-ET's Cigar(419)
From: Al Grauer
Series: Travelers In The Night
Caption: Artist's concept of interstellar object1I/2017 U1 ('Oumuamua) as it passed through the solar system after its discovery in October 2017. The aspect ratio of up to 10:1 is unlike that of any object seen in our own solar system., Credit: European Southern Observatory / M. Kornmesser
The first alien object to observed visiting our solar system arrives from truly deep space and leaves us with the mystery of what it is and how it ...

Bought by KICI Iowa City, KGLP, RADIOLEX, KRWG, KKRN and more


  • Added: Nov 07, 2021
  • Length: 02:00
  • Purchases: 8
666-Red Dwarf Planets(417)
From: Al Grauer
Series: Travelers In The Night
Caption: Gliese 887C, Credit: Mark Garlick/ University of Göttingen
Earth like planets are being discovered circling the most common type of star in our neighborhood of the Milky Way galaxy.

Bought by KICI Iowa City, KGLP, RADIOLEX, KRWG, KKRN and more


  • Added: Oct 31, 2021
  • Length: 02:00
  • Purchases: 8
665-Odd Ball(416)
From: Al Grauer
Series: Travelers In The Night
Caption: Asteroid Shattering, Credit: NASA
A small asteroid soars into the lonely space high above and below the plane of our solar system.

Bought by KICI Iowa City, KGLP, RADIOLEX, WTIP, KRWG and more


  • Added: Oct 24, 2021
  • Length: 02:00
  • Purchases: 7
664-Extraterrestrial Whales(410)
From: Al Grauer
Series: Travelers In The Night
Caption: Europa, Credit: NASA
Perhaps the reason that we have not detected alien civilizations on distant worlds is because they exist in oceans covered by miles of radiation ab...

Bought by KGLP, Harford Community Radio, RADIOLEX, KICI Iowa City, WTIP and more


  • Added: Oct 17, 2021
  • Length: 02:00
  • Purchases: 8
663-Alien Rock?(409)
From: Al Grauer
Series: Travelers In The Night
Caption: Asteroid Illustration, Credit: NASA/JPL-Caltech
A rock from another solar system is likely to have streaked by Earth before heading back into interstellar space.

Bought by KICI Iowa City, KGLP, RADIOLEX, WTIP, KKRN and more


  • Added: Oct 10, 2021
  • Length: 02:00
  • Purchases: 7
662-Earth's Pet Rock(408)
From: Al Grauer
Series: Travelers In The Night
Caption: Asteroid Eros, Credit: NASA
On it's gravitational leash, Earth's pet space rock, 2016 HO3, accompanies us at a distance of between 38 and 100 times the Moon's distance from Ea...

Bought by KICI Iowa City, KGLP, RADIOLEX, KRWG, KKRN and more


  • Added: Oct 03, 2021
  • Length: 02:00
  • Purchases: 7
661-Roving Venus (400)
From: Al Grauer
Series: Travelers In The Night
Caption: An illustration of a concept for a possible wind-powered Venus rover., Credit: NASA/JPL-Caltech
To survive on Venus where the temperature is 864F and the surface air pressure is 90 times that of Earth, NASA and JPL engineers are exploring the ...

Bought by KGLP, RADIOLEX, KICI Iowa City, KRWG, KKRN and more


  • Added: Sep 26, 2021
  • Length: 02:00
  • Purchases: 7
660-Double Comet (403)
From: Al Grauer
Series: Travelers In The Night
Caption: Comet Neat observed At Kitt Peak, Credit: NASA
What at first appeared to be an asteroid turned out to be a double comet.

Bought by KGLP, KICI Iowa City, RADIOLEX, KKRN, KRWG and more


  • Added: Sep 19, 2021
  • Length: 02:00
  • Purchases: 7
659-Martian Debris(382)
From: Al Grauer
Series: Travelers In The Night
Caption: Mars, Credit: NASA
Martian Trojan asteroids have stable orbits around the Sun, leading and trailing the red planet by 60 degrees, where the Sun's and Mars's gravity a...

Bought by KGLP, RADIOLEX, KKRN, KRWG, Harford Community Radio and more


  • Added: Sep 12, 2021
  • Length: 02:00
  • Purchases: 6

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