Albert D. Grauer
Travelers In The Night
A real "Science Snack" for anyone who is interested in the extraterrestrial. Dr. Al Grauer is a member of the Catalina Sky Survey which has led the world in near Earth asteroid discoveries for 17 of the past 19 years. The music is "Eternity" by John Lyell. Astronomy Asteroids Space NASA Comets Earth Impact Aliens
Author
Albert D. Grauer
Category
Podcast website
Latest episode
Jul 10, 2026
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Episodes
476-Lost Comet 31.07.2018 2:01
On July 1, 1770 Comet Lexell passed about 6 times the moon's distance from planet Earth, the closest a comet has ever come to humanity. After that it completely disappeared . After more than 200 years of searching, researchers have identified what may be a piece of long lost Comet Lexell.
475-Lonely Fragment 27.07.2018 2:01
A 2000 foot diameter space rock has stories to tell about violent events long ago. Asteroid hunters are eager to track this huge collision fragment and look for members of it's family as it passes near Earth in 2026.
474-Earth-Venus Shuttle 24.07.2018 2:01
A 100 foot diameter asteroid is spotted on one of it's regular trips between the orbits of Venus and Earth. It's ultimate fate is to collide with one of these planets producing a spectacular light show.
473-Ryugu Bound 20.07.2018 2:01
The Japan Aerospace Exploration Agency is conducting a six year flight from Earth to a potentially hazardous asteroid, Ryugu, and return a sample of it to Earth for study. Ryugu is likely to have under gone little change since the formation of the solar system and samples of it will provide unique clues about the composition of the small bodies which brought water and the chemicals needed for life...
472-Martian Mysteries 17.07.2018 2:01
Two exciting new scientific discoveries have ignited our curiosity and are guiding our search for evidence of past and/or present life on Mars.
471-Botswana Bound 13.07.2018 2:01
A small space rock with a diameter less than the height of an NBA basketball player had just crossed the orbit of our Moon on a collision course with Earth when it was spotted streaking through the constellation of Scorpius by my Catalina Sky Survey teammate Richard Kowalski. 8 hours and 37 minutes after Richard's discovery observations, the space rock now known as 2018 LA was seen by security cam...
470-Martian Asteroid Hunters 10.07.2018 2:01
The life of an asteroid hunter on Mars will be interesting and exciting. The double planet, our Earth and Moon, in the Martian night sky will be an unforgettable sight and well worth the trip.
469-Flying Couch 06.07.2018 2:01
My birthday present from outer space was the opportunity to use the Catalina Sky Survey's 60 inch telescope on Mt. Lemmon, Az to discover a tiny sofa couch sized asteroid as it was flying through the constellation of Bootes. Once every 6 months or so, lucky observers will witness a sofa sized space rock similar to 2018 KW1 entering the Earth's atmosphere creating a spectacular light show, and rain...
468-Peek A Boo Asteroid 03.07.2018 2:01
A strange asteroid plays hide and seek with frustrated astronomers.
467-Time Travel 29.06.2018 2:01
Looking out into space takes you back in time. To experience time travel go to a natural night sky location like the Cosmic Campground International Dark Sky Sanctuary or another location on the darksky.org website.
466-Dangerous Impactors 26.06.2018 2:01
Asteroid hunters have discovered more than 90% of the Earth approaching asteroids whose impact could cause global climate change. It was thus unusual when the Catalina Sky Survey found two, new, such giant space rocks in less than a week.
465-Returnee 22.06.2018 2:01
After being lost for ten years, the asteroid 2010 WC9 was re-discovered about a week before it came very close to Earth.
464-Big Atira 19.06.2018 2:01
The recent discovery of an asteroid, whose orbit lies completely within that of the Earth, reminds asteroid hunters to continue to search near the Sun so that a large dangerous object does not sneak up undetected on the residents of planet Earth.
463-Exiled Asteroid 15.06.2018 2:01
An asteroid is exiled to the outer regions of the solar system during Jupiter's rampaging tack away from the Sun long ago. During that process enough material was left in Jupiter's wake to form Venus, Earth, Mars, and the asteroid belt as we know them today.
462-Our View 12.06.2018 2:01
Modern technology provides us with stunning views of objects in the Universe in wavelengths invisible to our eyes, however, nothing is as moving and thought provoking as looking into deep space with your very own eyes.
461-Brian's First 08.06.2018 2:01
Brian Africano's first Potentially Hazardous Asteroid discovery can come near to the Earth and Mars.
460-TESS 05.06.2018 2:01
To find planets close to home NASA has launched TESS the Transiting Exoplanet Satellite which will monitor more than 200,000 nearby, stars over the entire sky to detect the tiny dips in light caused when a planet passes in front of it's star. The TESS era will be a most exciting time as humans discover and are able determine the properties of relatively nearby habitatable worlds and dream about wh...
459-Falling Space Rocks 01.06.2018 2:01
In the early evening of January 17, 2018 six hundred and seventy four observers in 11 States and Canada reported a fireball meteor streaking across the sky to the American Meteor Society. To find freshly fallen meteorites visit the American Meteor Society's website but do not hunt for meteorites on private land without permission.
458-Large and Close 29.05.2018 2:01
On June 30, 1908 a celestial object exploded 28,000 feet above the Tunguska river drainage area in Siberia, Russia releasing the energy of 185 Hiroshima sized atomic bombs. Recently a similar sized space rock made a sudden appearance before it passed very close to our Earth and Moon.
457-30 Years Of Fireballs 25.05.2018 2:01
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 in your report to the American Meteor Society and become a citizen scientist.
456-Dangerous Trio 22.05.2018 2:01
In the space of only four days, my Catalina Sky Survey teammates, Brian Africano, Alex Gibbs, and Greg Leonard, discovered three Potentially Hazardous Asteroids. Searching for such a large space rock on an impact trajectory with planet Earth is what keeps my team, the Catalina Sky Survey, going to our four telescopes, 24 nights per month, when the moon isn't too bright, in the Catalina Mountains n...
455-17,000 To Go 18.05.2018 2:01
So far asteroid hunters have discovered about 8,000 of the 25,000, large, potentially hazardous asteroids, suspected to exist, leaving 17,000 more to be discovered. For this reason, NASA has designed and proposed the NEOCam spacecraft to give us the ability to find them before they find us.
454-Comets And Asteroids 15.05.2018 2:01
If you set your mind to it, you can find and hold a sample of an asteroid, called a meteorite, which has landed on the Earth's surface. On the other hand, watching major meteor showers will allow you to see but not touch comet dust as it enters and burns up in the Earth's atmosphere.
453-HAMMER 11.05.2018 2:01
Theoretically, If an asteroid on a collision course with our planet could be slowed sufficiently it could be made to pass behind our planet as it orbits the Sun. It is not as easy as we would like.
452-Small But Deadly 08.05.2018 2:01
My Catalina Sky Survey teammate Greg Leonard's discovery of, 2018 FO5, a three football field diameter asteroid that can come closer than our Moon is a reminder that we need to keep searching for the many thousands of Potentially Hazardous asteroids larger than 500 feet in diameter which are likely to exist.
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