Travelers In The Night - podcast cover

Travelers In The Night

Albert D. Grauertravelersinthenight.org
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
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Episodes

810-Humans Can

The James Webb Space Telescope or JWST for short is a superb scientific instrument which is revolutionizing our understanding of the structure of the universe and is providing a tool to help us to explore the possibility of life outside of Earth. It is also a testament to what humans can accomplish by working together.

Aug 16, 20242 min

297E-316-Weird Centaur

My Catalina Sky Survey teammate Richard Kowalski was surprised to find a moving point of light on some his images which was more than 50 times brighter than a typical Earth approaching object he observes . He was even more amazed when it was not cataloged as a known object and he reported his observations to the Minor Planet Center. A couple of hours before Richard spotted it, scientists using the Space Surveillance Telescope in New Mexico had picked up this unknown object on some of their image...

Aug 13, 20242 min

809- How Close Can An Asteroid Approach

The Earth Minimum Orbit Intersection Distance or Earth MOID for short is the closest an asteroid can come to our home planet on it's current orbit.

Aug 09, 20242 min

296E-314-Our Number

Recently my Catalina Sky Survey teammate Greg Leonard discovered, 2016 WJ1, a relatively large asteroid which can come close but will not hit the Earth. The extremely unlikely scenario of an impactor with our number on it would start the with the report of a fast moving point of light in the night sky. After a few days of data the Minor Planet Center would give it a name. Tracking the new asteroid, asteroid hunters would be alarmed as the chances that this object will impact the Earth starts to ...

Aug 06, 20242 min

808-Global Auroras on Mars

When the Earth enters a stream of high speed protons and other charged particles in the solar wind or our home planet is impacted by a solar coronal mass ejection the Earth’s strong magnetic field acts a a shield. Mars on the other hand lacks an Earth-like magnetic field and thus has little protection from solar storms.

Aug 02, 20242 min

295E-313-Martian Motherlode

Water for Martian Colonists Martian colonists will need to create mini environments with air to breathe and water to drink. Energy will be required to keep warm, power the settlement, and enable vehicles to move around the planet.

Jul 30, 20242 min

807-Moon Orbit Crossers

During a recent 60 day period of time 23 space rocks came closer to Earth than our Moon

Jul 26, 20242 min

294E-312-200 Yards Of Trouble

Dangerous Asteroids Are Still Out There Recently my Catalina Sky Survey teammate Greg Leonard discovered a rapidly moving point of light in the night sky. Subsequent observations made by telescopes in Arizona, Romania, Illinois, the Czech Republic, Australia, and France revealed it to be a close approaching Potentially Hazardous Asteroid. The Minor Planet Center named it 2016 WJ1. This asteroid is about 200 yards in diameter, orbits the Sun once every 567 days, and currently can come to within a...

Jul 23, 20242 min

806-Distant PHA

It is hard to obtain time on the 8m Gemini South Observatory telescope on Cerro Pachon in Chile and the Large Binocular Telescope with its twin 8m mirrors on Mt. Graham, Arizona since they are among the largest telescopes in the world. My Catalina Sky Survey teammate Kacper Wierzchos wrote a scientifically competitive proposal to obtain the time to track the potentially hazardous asteroid 2016 PR38 on both of these telescopes when it was near its furthest point from our Sun and thus much too fai...

Jul 19, 20242 min

293E-311-Bright and Bald

My Catalina Sky Survey teammate Carson Fuls discovered 2015 TC25 as a rapidly moving point of light in the night sky. Followup observations using data from four different telescopes has enabled a team of astronomers led by Dr. Vishnu Reddy of the University of Arizona's Lunar and Planetary Laboratory to determine that this small asteroid reflects four times more of the sunlight than do most other Earth approaching asteroids. Dr. Reddy points out that large asteroids are covered by a blanket of d...

Jul 16, 20242 min

805-Very Close Miss

During a recent 60 day period asteroid hunters observed 23 asteroids which came closer to us than our Moon. Six of them passed closer to the Earth’s surface than 22,236 miles which is the distance to our communication satellites.

Jul 12, 20242 min

292E-310-Ethics and Mars

Should martian microbes be sacrificed to human space exploration? It is unlikely that any living organism could survive being blasted from the surface of a planet, travel through interstellar space on a meteoroid, survive a fiery entry through another planet's atmosphere, and be viable when it reaches the surface. However, humans are breaching this interplanetary barrier. We have robots operating and are planning to land colonists on the red planet. This situation has prompted doctoral student D...

Jul 09, 20242 min

804-Tracie's Solo

After months of training Tracie came full circle during her first solo 3 night observing run on the 60 inch telescope as she hosted groups of visitors as the observer instead of the tour guide.

Jul 05, 20242 min

291E-309-Tiny Atira

Atira, named for the Pawnee goddess of Earth and the Morning and Evening Star orbits the Sun inside of our path. Atira, the first of this type of asteroid, was discovered by the Lincoln Near-Earth Asteroid Research Program using telescopes in New Mexico. Atira is a stony object more than a mile in diameter, spins on it's axis of rotation once every three hours, has an irregular shape, and orbits the Sun once every 233 days. This asteroid was named Atira who is a goddess of the Native American Pa...

Jul 02, 20242 min

803-Monster NEO

Since larger space rocks are rare, it was surprising when my Catalina Sky Survey teammate Hannes Groller found a half mile diameter asteroid traveling through the constellation of Auriga.Fortunately on it’s current path 2024 JW1 can’t come closer than 53 lunar distances from us. Asteroid hunters will continue to track 2024 JW1 to make sure that it does not become a threat as it passes near Earth, Mars , and Jupiter.

Jun 28, 20242 min

290E-306-Egg Rock

Egg rock's chemical composition and visual appearance is so different from other native Mars rocks that scientists have concluded that it is a meteorite which came from the molten core of an ancient asteroid.

Jun 25, 20242 min

802-Bok Comet

My Catalina Sky Survey teammate Kacper Wierzchos was asteroid hunting in the constellation of Draco with the Steward Observatory Bok 90 inch telescope on Kitt Peak, Arizona when he discovered a faint fuzzy object moving through the night sky.Given the global warming which is happening in 2024 one has to wonder about the state of humanity and our home planet when comet C/2024 G1 (Wierzchos) returns to the inner solar system in 3331 CE.

Jun 21, 20242 min

289E-305-Murky

It was murky cloudy night on Mt. Lemmon where I was trying to find Earth approaching objects with the Catalina Sky Survey 60 inch telescope. At about 1AM another hole in the clouds opened and I could see stars on the all sky video camera. On this fourth attempt, one set of images showed a bright rapidly moving object. Followup observations by my teammate Greg Leonard using the Catalina Sky Survey 40 inch telescope next door and two different observers in Japan provided the data which allowed the...

Jun 18, 20242 min

801-Jacqui's PHA

My Catalina Sky Survey teammate Jacqueline Fazekas was asteroid hunting with our small but mighty Schmidt telescope on Mt. Bigelow, Arizona when she spotted and then reported a bright moving point of light in the night sky to the Minor Planet Center.Given the rate of human caused climate change one has to wonder about the state of our planet in January of 2163 when 2024 ER is predicted to pass safely some 66 lunar distances from humanity.

Jun 14, 20242 min

288E-304-Close One

My Catalina Sky Survey teammate Rose Matheny had no way of knowing that the fast moving point of light that she had just discovered would create such a stir. Rose sent in her discovery and followup observations to the Minor Planet Center where astronomers calculated that her discovery would make a very close approach to Earth about two days later and gave it the name 2016 RB1. More than two dozen observatories around the world tracked 2016 RB1 as it came towards us.

Jun 11, 20242 min

800-Telescope Reborn

In an astonishing rebirth, the Mayall 4-m telescope has jumped to the forefront of astronomy once again because it is sturdy and precise enough to carry the massive Dark Energy Spectroscopic Instrument which routinely obtains the spectra of 5,000 galaxies simultaneously.

Jun 07, 20242 min

287E-302-Sensing A Comet

More than 400 years ago Galileo Galilei expanded human vision using a telescope to view the cosmos. Since then humans have extended their senses to view the Universe in x-rays, ultraviolet, infrared, radio, and other portions of the electromagnetic spectrum not accessible to our senses. In a pioneering effort, Ekaterina Smirnova has employed the spectroscopy, magnetometry, and molecular data collected by the Rosetta spacecraft to create watercolor paintings, sculptures, a musical collaboration, ...

Jun 04, 20242 min

799-Nature's Gateways

The Cosmic Campground International Dark Sky Sanctuary and the Aldo Leopold Gila Wilderness in New Mexico are gateways to nature where man is only a visitor.These New Mexico neighbors give us a sense of wonder, glimpses of history, new knowledge to mitigate the effects of man’s excesses, and many other opportunities we are yet to fully appreciate.

May 31, 20242 min

286E-301-Visitors From Afar

A pair of comets visiting our neighborhood are discovered in a matter of 4 days. One of the perks of being an asteroid hunter is having a comet named for you. To do this you must be the first to discover it as a moving point of light in the night sky and at the same time recognize that it is a comet by observing the coma and tail which are names for the clouds of gas and dust that surrounds it. After being on the lookout for a comet for sometime, my Catalina Sky Survey teammate Rose Matheny disc...

May 28, 20242 min

798-Destination Enceladus

Life on Earth appears to have formed in our oceans. Scientists are thus on the hunt for other worlds which have oceans of liquid water and thus potentially could be the home of fellow living creatures.

May 24, 20242 min

285E-299-Sporadic Geysers

Using a small telescope or a set of binoculars you can see Europa for yourself as a small moving point of light circling the giant planet Jupiter. More than 400 years after Galileo Galilei discovered this seemingly small dead world the Hubble Space Telescope spotted geysers erupting from its south polar regions. Recently, over a 15 month period, the Hubble was able to observe 10 transits of Europa across the face of Jupiter. On three such occasions plumes were seen to be erupting from this small...

May 21, 20242 min

797-Recoveries

It is essential that asteroid hunters keep track of potentially dangerous asteroids to make sure that their orbits haven’t changed as they encounter other objects in space to make them a threat to our home planet.

May 17, 20242 min

284E-298-Rosetta

The Rosetta Spacecraft left planet Earth in 2004. During its twelve year lifetime this robotic emissary traveled 5 billion miles on 6 trips around the Sun, flew by Earth three times, visited Mars, and cruised by two asteroids. Rosetta needed to take such a long path to use the gravity of Earth and Mars to accelerate it to a speed which would allow it to rendezvous with a comet. Upon arrival, Rosetta successfully spent two years studying the comet at close range and sent a probe to it's surface. ...

May 14, 20242 min

796-COMET C.2024 E1 (Wierzchos)-Preview

On the 3rd of March 2024 while asteroid hunting with our 60 inch telescope on Mt. Lemmon , Arizona my Catalina Sky Survey teammate Kacper Wierzchos discovered a comet moving through the constellation of Draco.Since we don’t know Kacper’s comet’s chemical composition it is impossible to accurately predict how. bright it will be as it crosses the Earth’s orbit December 12, 2025, rounds the sun January 20, 2026, and crosses our orbit again February 27, 2026.

May 10, 20242 min

283E-297-White Sky

Inappropriate night time outside lighting causes accidents and does not deter crime. However, it blinds you from the beauty of the Universe which surrounds you.

May 07, 20242 min
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