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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

99E-111-Green Meteors

Travelers In The Night ·

2020/10/20

Recently, my wife and I saw a beautiful, bright, green, meteor fireball streaking across the western New Mexico night sky. Such sightings by some UFO enthusiasts , have been advanced as the best observations of alien spacecraft. Other observers have explained this phenomena as being sightings of secret American or Russian spy devices.

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2:01

610-Atmospheric Gravity Waves

Travelers In The Night ·

2020/10/16

Atmospheric gravity waves can be powerful. In September of 2018 two glider pilots surfed an atmospheric gravity wave created by high speed polar winds as they encounter the Andes mountains. Amazingly their unpowered aircraft reached an altitude of more than 76,000 feet on a wave which itself can travel to more than 100,000 feet above sea level . By studying atmospheric gravity waves generated by tornadoes, hurricanes, earthquakes, and tsunamis scientists hope we may be able to mitigate the disasters

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2:01

98E-110-Asteroids Accessible By Human Space Flights

Travelers In The Night ·

2020/10/13

So far humans have discovered about 100 asteroids which could be visited by astronauts with current rocket capability. My group, the NASA funded Catalina Sky Survey at the University of Arizona has discovered 65% of these Earth approaching space rocks.

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2:01

609-Lurking

Travelers In The Night ·

2020/10/09

Statistically asteroid hunters have found more than 90% of the asteroids whose impact could cause global climate change. However, recently, my Catalina Sky Survey teammate Greg Leonard was observing in the constellation of Pegasus with our 60 inch telescope on Mt. Lemmon, Arizona when he spotted a large, unknown, fast moving asteriod in the night sky.

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2:01

97E-109-Eighteen Sleeps Later

Travelers In The Night ·

2020/10/06

The NASA, New Horizons spacecraft woke up from its 18th sleeping period in the last 9 years. Its long space naps have lasted an average 104 days each. It has traveled 9 years from Earth and has crossed the orbit of Neptune. Even though the New Horizons has journeyed nearly 3 billion miles it finds itself more than one and a half times further from its destination, the Pluto system, than the Earth is from the Sun.

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2:01

608-Triple Comet

Travelers In The Night ·

2020/10/02

Recently amateur astronomer, Worachate Boonplod discovered the 4049th comet recorded in the imaging data produced by SOHO, the ESA/NASA Solar and Heliospheric Observatory. To discover your very own comet visit the NASA Sungrazer Project website for the data and tips on how to proceed.

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2:01

96E-108-How Close Will It Come To Us

Travelers In The Night ·

2020/09/29

The goal of the NASA Near Earth Object Program is to provide an early warning should an asteroid be found to be on a path bringing it close to planet Earth. Look at the Near Earth Object websites and you will know about any close approaches as soon the calculations are made.

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2:01

607-Good Night

Travelers In The Night ·

2020/09/25

Nearly every day during the monsoon rainy season in the American southwest, afternoon thunderstorms require putting mountain top telescopes and cameras into a lightning safe mode. Through holes in the clouds asteroid hunters continue to search the sky for Earth approaching objects.

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2:01

95E-107-Mining Asteroids

Travelers In The Night ·

2020/09/22

Science fiction writers have long imagined human space colonies which use the resources they find.It will take major, risky investments over many years to develop the capability to use asteroids to enable humans to explore our neighborhood in space. Asteroid mining may seem far fetched, however, many of the things that we are doing today were science fiction a few years back.

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2:01

606-Falling Stones

Travelers In The Night ·

2020/09/18

Approximately 100 million metric tons of mostly sand grained sized space dust enters the Earth's atmosphere every day. Occasionally, larger pieces become fireball meteors which can even be seen in the daytime as they streak across the sky. Sometimes one explodes and showers the ground with meteorites. Finding one of them can be fun and rarely a meteorite can be worth more than its weight in gold.

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94E-106-Your Reality Fueled Spacecraft

Travelers In The Night ·

2020/09/15

Computers are extremely efficient at processing numbers while humans excel at visualization. NASA and JPL have developed a computer environment, based on game software architecture, which allows you explore the solar system and beyond using real scientific data. It is called Eyes on The Solar System.

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2:01

605-Monsoon Nights

Travelers In The Night ·

2020/09/11

Every year the Monsoon summer rains come to the American southwest in July and August. After the threat of wild fires has been rained out, monsoon time continues to be difficult for asteroid hunters. Even so this season is used to find interesting objects and to prepare our equipment for the clear skies we hope for in the fall.

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2:01

93E-105-A New Chapter In The Human Exploration Of Space

Travelers In The Night ·

2020/09/08

The first unmanned test flight of the new NASA Orion Spacecraft went perfectly. It made two orbits of the Earth traveling as far as 3600 miles above the surface of our planet. Its path took it nearly 15 times higher than the international space station. This is further than any spacecraft designed for humans has flown since the Apollo era.

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2:01

604-Comet Rankin

Travelers In The Night ·

2020/09/04

There may be as many as a trillion small icy objects in the Oort cloud near the outer edge of our solar system. Very rarely one of these frozen ice balls is jostled by the gravity of a nearby star causing its distant path about our Sun to be transformed into one which takes it near the planets we know. Most of these small comets pass unnoticed by humans although occasionally one can become bright enough to be seen with the naked eye.

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2:01

92E-104-Jupiter Trojan Confusion

Travelers In The Night ·

2020/09/01

Humans know of approximately half million main belt asteroids orbiting the Sun between Mars and Jupiter. We have also found approximately 11,000 Earth approaching asteroids. Members of these two groups can be recognized by briefly observing their motion since their paths about the Sun are very different. Jupiter Trojans, on the other hand, occupy a point either 60 degrees in front or behind Jupiter as it moves about the Sun. Their orbit around the Sun takes about 5 and a half years so short

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2:01

603-Discovering Alien Life

Travelers In The Night ·

2020/08/28

Our star is only one among hundreds of billions in the Milky Way galaxy which itself is only one of a hundred billion or more galaxies in the known universe. How can it be that humans are the only creatures to look at the night sky and wonder about who else is out there? Perhaps taking a close look at the human race is a way to find extraterrestrials.

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2:01

91E-103-Small Asteroids In Earth-like Orbits

Travelers In The Night ·

2020/08/25

Four days after it made its closest approach to Earth, I found a 10 foot diameter asteroid with the NASA funded University of Arizona 60 inch telescope on Mt. Lemmon. At that point it was 838,000 miles from us and was moving away at about 3 miles/second. Previously, It had been about half the distance to the Moon from planet Earth. This small asteroid orbits the Sun every 349 days on a path which crosses our orbit twice a year. Calculations by the NASA - JPL group indicate that it can come within

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2:01

602-Solar Flares

Travelers In The Night ·

2020/08/21

Some stars can have flares which can cause them to more than double in brightness in a few minutes. Fortunately our Sun does not do that and the Earth's atmosphere and magnetic field protect humans from the smaller flares which do occur on our star. In 2020 the Sun is beginning a new solar cycle and by 2024 we should be seeing solar flares with increased frequency. It will be important to put our electronics into a safe mode should a major solar flare occur.

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2:01

90E-102-Little Asteroid On An Inside Track

Travelers In The Night ·

2020/08/18

2014 US7 is called an Aten [Ah tin] type of asteroid. The first of its type was discovered by Dr. Eleanor Key Francis "Glo" Helin in 1976. She was an American astronomer who discovered more than 800 asteroids and several comets. During her long career she made the transition from glass plates to the latest electronic detectors. She was a leader in the establishment of the Near-Earth Tracking Project which discovered more than 36,000 asteroids.

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2:01

601-Phaethon's Child

Travelers In The Night ·

2020/08/14

Phaethon (Faith on) is a strange, 4 mile diameter, blueish asteroid. It travels on an orbit which comes so close to the Sun that its exterior is heated to 1,500 F. When you go out to view the Geminids in December you might consider what this space rock has to tell you.

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