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PODCAST

Travelers In The Night

Albert D. Grauer

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

science astronomy

All Episodes

2:01

750-Asteroid Slam(538)

Travelers In The Night ·

2023/06/23

Humans are slamming projectiles into space rocks. These experiments will give us the know how to deal with a dangerous space rock which has our number on it

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2:01

239E-251-Fresh Lunar Craters

Travelers In The Night ·

2023/06/20

The moon is being hit by objects in the present epoch.Fresh lunar craters tell us about objects which enter the Earth-Moon system.

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2:01

749-Earth Glow(537)

Travelers In The Night ·

2023/06/16

In 1972 Apollo 16 astronauts took an ultraviolet image of the Earth from the Moon which shows that like the Sun ,the Earth too, has a faint corona of gas surrounding it. Scientists are just beginning to explore how Earth's glow relates to our weather and climate.

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2:01

238E-250-Born Wild

Travelers In The Night ·

2023/06/16

Jupiter and Saturn helped to produce where we live.Our home planet was formed after a period of chaos in the solar systemToday our solar system is a pretty calm place. However, meteorites we find on Earth as well as the cratering we observe on our Moon, Mercury, Mars, and other bodies suggest that our solar system was born wild and stayed that way for a while. There is also the puzzling fact that our sparsely packed inner solar system is very different from the densely packed, close in, planetary

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2:01

748-Ultima Thule(536)

Travelers In The Night ·

2023/06/09

Traveling an additional billion miles beyond Pluto, the New Horizons spacecraft is now sending back data on 2014 MU69, a strange snow man shaped object which orbits the Sun once every 298 years. The New Horizons is spacecraft is likely to continue its lonely odyssey until the end of time.

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2:01

237E-249-Tough Tourist

Travelers In The Night ·

2023/06/06

Rocky metallic asteroid can stand the heat.A block and a half sized asteroid makes visits to Mercury, Venus, Earth, Mars, and Jupiter.

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2:01

747-Alone or Not(535)

Travelers In The Night ·

2023/06/02

In our Milky Way Galaxy alone there are probably 25 billion planets located within the habitable zone of its star where there could be air to breathe and liquid water on its surface. The search is on for advanced civilizations .

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2:01

236E-248-Incoming

Travelers In The Night ·

2023/05/30

What happens when an asteroid is heading in our direction.A close approaching asteroid was observed as it passed between the Earth and our Moon.

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2:01

746-Followups(534)

Travelers In The Night ·

2023/05/26

Without followup data, many if not most of the Earth approaching objects would be lost as they move away from us leaving us with no idea when they might return to near Earth space or perhaps even strike our home planet.

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2:01

235E-247-Potential Mining Target

Travelers In The Night ·

2023/05/23

My Catalina Sky Survey teammates have discovered an asteroid which could be a potential mining target. Mining asteroids may be a much cheaper way to get the raw materials that space colonists need when compared to the cost of lugging supplies up from the surface of our planet. Using the abundant solar energy in space, water ice from asteroids can be turned into hydrogen and oxygen which is ideal rocket fuel. The metals which many asteroids contain can be turned into the items space explorers

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2:01

745-100 Moons(533)

Travelers In The Night ·

2023/05/19

A small telescope makes a substantial contribution to our knowledge of the celestial visitors to our neighborhood

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2:01

234E-246-Anatomy Of An Extinction Crater

Travelers In The Night ·

2023/05/16

By drilling into a crater rim, researchers hope to discover how the Earth and it's life forms recovered from an asteroid impact.

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2:01

744-Teddy’s Debut(532)

Travelers In The Night ·

2023/05/12

On a recent training night with Teddy Pruyne at the controls of our 60 inch telescope on Mt. Lemmon, Arizona, this duo discovered six new Earth Approaching Objects, an inner main belt asteroid, and rediscovered an inner main belt asteroid which had been lost.

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2:01

233E-245-Asteroid Awareness

Travelers In The Night ·

2023/05/09

You are less likely to be injured by a space rock than you might thinkRecently in response to a question from a reader of the "Asteroid Day" blog, my Catalina Sky Survey team captain Eric Christensen, wrote a blog piece entitled "Is It Just Me, Or Are Asteroids More Dangerous They Used To Be?".

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2:01

743-Alex’s Catch(531)

Travelers In The Night ·

2023/05/05

On a cold windy night, with clouds frustrating his search, my Catalina Sky Survey teammate Alex Gibbs discovered 8 new celestial visitors while observing with our 60 inch telescope on Mt. Lemmon, Arizona

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2:01

232E-244-Earths Wobble

Travelers In The Night ·

2023/05/02

A careful study of the Earth's motion in space is a key to understanding past climate change and enables us to predict future patterns of flooding and drought.Wobbles tell all.

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2:01

742-Cuban Meteorites(530)

Travelers In The Night ·

2023/04/28

A large fireball meteor which exploded over Cuba produced a number of interesting results.

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2:01

231E-243-Comet Ahoy

Travelers In The Night ·

2023/04/25

Recently a relatively dim object, Comet P/2016 BA14 flew past Earth at about 9 times the distance to our Moon from us. It was the third closest comet approach in recorded history. This situation allowed NASA scientists to use the Goldstone Solar System Radar located in California to obtain detailed RADAR images. These revealed the nucleus of P/2016 BA14 to be about 3000 feet in diameter. It slowly spins once very 35 to 40 hours as it travels on its 5.26 year orbital path around the Sun. Observations

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2:01

741-Africano(529)

Travelers In The Night ·

2023/04/21

My Catalina Sky Survey Teammate Brian Africano discovered his 4th comet while asteroid hunting in the constellation of Ursa Major with our Schmidt telescope on Mt. Bigelow, Arizona. Observers with small telescopes equipped with electronic cameras are able to track Brian's 4th comet as it comes to near the orbit of Mars before it retreats into the cold dark region of our solar system not to return until 3000 AD.

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2:01

230E-242-Spray Paint

Travelers In The Night ·

2023/04/18

A gentle method of causing an asteroid to miss planet Earth.Will spray paint save the world?Recently, NASA scientists using the giant RADAR telescope in Puerto Rico measured changes in the orbit of the asteroid Bennu. They found that a tiny sunlight pressure of 1/2 oz on this 68 million ton object has changed it's orbit about a hundred miles over a 12 year period of time. These NASA astronomers thus measured the Yarkovsky force which was first suggested by a Russian engineer more than a hundred

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