Catalog Search Results
Publisher
Kanopy Streaming
Pub. Date
2014.
Language
English
Description
Visible light, which can be seen with our eyes, comprises a small sliver of the electromagnetic spectrum. The rest of the spectrum, from short wavelength gamma rays to long-wavelength radio waves, requires special instruments to detect. ALMA uses and array of radio telescopes to detect and study radio waves from space. Radio telescopes are typically large parabolic dish antennas used singly or in an array. Radio observatories are preferentially located...
Publisher
The Great Courses
Pub. Date
2013.
Language
English
Description
The Kepler mission is changing everything we know about extrasolar planets. Learn how this supersensitive-imaging instrument works to monitor 157,000 stars continuously for years and what it has uncovered since launching in 2009. But first, review the transit effect created when a parent star crosses its orbiting planet.
Publisher
The Great Courses
Pub. Date
2017.
Language
English
Description
With an array of 66 radio antennas located in the high Chilean desert above much of the earth's atmosphere, the Atacama Large Millimeter/submillimeter Array (ALMA) is a radio telescope tuned to the higher frequencies of radio waves. Designed to examine some of the most distant and ancient galaxies ever seen, ALMA has not only revealed new stars in the making, but planetary systems as well.
Publisher
The Great Courses
Pub. Date
2017.
Language
English
Description
Using the laws of physics and electromagnetic radiation, astronomers can "weigh" a galaxy by studying the distribution of its rotating hydrogen. But when they do this, it soon becomes clear something is very wrong: A huge proportion of the galaxy's mass has simply gone missing. Welcome to the topsy-turvy world of dark matter - which we now believe accounts for 90 percent of our own Milky Way.
Publisher
The Great Courses
Pub. Date
2017.
Language
English
Description
Interstellar clouds favor formation of carbon-based molecules over any other kind - not at all what statistical models predicted. In fact, interstellar clouds contain a profusion of chemicals similar to those that occur naturally on Earth. If planets are formed in this rich soup of organic molecules, is it possible life does not have to start from scratch on each planet?
Publisher
The Great Courses
Pub. Date
2023.
Language
English
Description
Explore the imminent fate of the luminous star Eta Carinae, a ticking bomb due to explode as a supernova in the next few hundred thousand years. Study the life cycle of stars, and trace the history of Eta Carinae to mysterious events first observed in 1843.
Publisher
The Great Courses
Pub. Date
2017.
Language
English
Description
In the mid-1960s, astronomers discovered signals with predictable periodicity but no known source. In case these signals indicated extraterrestrial life, they were initially labeled LGM, Little Green Men. But research revealed the source of the pulsing radiation to be neutron stars.
Publisher
The Great Courses
Pub. Date
2017.
Language
English
Description
The Green Bank Observatory is located within the 13,000-acre National Radio Quiet Zone straddling the border of Virginia and West Virginia. Come tour this fascinating facility where astronomers discovered radiation belts around Jupiter, the black hole at the center of our galaxy, and the first known interstellar organic molecule, and began the search for extra-terrestrial life.
Publisher
The Great Courses
Pub. Date
2017.
Language
English
Description
Take a tour of our neighboring planets via their radio emissions and learn how scientists infer their temperatures and energy sources. You'll be shocked by the difference between their images in reflected sunlight - the images we're familiar with - and their appearance when we "see" the radio energy they emit on their own.
Publisher
The Great Courses
Pub. Date
2023.
Language
English
Description
Use the sharp eye of the Hubble Space Telescope to survey some of the most peculiar galaxies in the local universe. Focus on Hoag's Object, a ring galaxy with a yellow nucleus, surrounded by a nearly perfect circle of hot blue stars. Explore competing ideas for the origin of this unique structure.
Publisher
The Great Courses
Pub. Date
2017.
Language
English
Description
Delve into the surprisingly tricky problem of deciding when a lunar month begins - usually determined by the first sighting of a crescent Moon after new Moon. Professor Schaefer describes his algorithm for calculating this event and then applies it to dating the crucifixion of Jesus.
Publisher
The Great Courses
Pub. Date
2015.
Language
English
Description
Explore the distinctive biosignatures that show the presence of life of any kind on an exoplanet. Then close with Professor Winn’s tip sheet on exoplanetary discoveries likely in the near future—from evidence of moons to planets being destroyed by giant stars..
Publisher
The Great Courses
Pub. Date
2023.
Language
English
Description
Search for the origin of the most powerful explosions since the big bang. Known as gamma-ray bursts, these colossal beams of high-energy radiation are among our deepest views into the cosmic past. Also consider the chance that a nearby gamma-ray burst could cause a mass extinction on Earth.
Publisher
The Great Courses
Pub. Date
2015.
Language
English
Description
A tiny percentage of exoplanets can be detected transiting—or passing in front of—their host stars. Combined with Doppler shifts, transits provide information about a planet’s size, mass, density, and likely composition. Learn how ambitious amateur astronomers can use this detection technique in their own backyards..
Publisher
The Great Courses
Pub. Date
2017.
Language
English
Description
Since no human can touch the sky, any unexpected celestial event must be a divine omen. Reenter this primordial state of mind, seeing eFilmclipses and comets the way they were perceived before the advent of modern science. In the course of this investigation, discover why comets became more feared than eFilmclipses.
Publisher
The Great Courses
Pub. Date
2013.
Language
English
Description
Based on data from Kepler, there are thought to be four main classes of transiting planets: hot Jupiters, hot Neptunes, super-Earths, and Earth-like planets. In this lecture, you will look at detailed highlights of the most fascinating examples of each of these new classes of alien worlds, from most to least massive.
Publisher
The Great Courses
Pub. Date
2015.
Language
English
Description
Survey the history of spectroscopy to understand how a telescope and a diffraction grating can disclose the composition of a star and its planet. Then learn how transits and occultations are ideal for analyzing planetary atmospheres, paving the way for the search for signatures of life..
Publisher
The Great Courses
Pub. Date
2023.
Language
English
Description
Investigate mounting evidence that invisible dark matter must exist. Then see how telescopes scanning the sky at different wavelengths have mapped the distribution of dark matter, notably in a collection of distant colliding galaxy clusters called the Bullet Cluster.
Publisher
The Great Courses
Pub. Date
2013.
Language
English
Description
After 50 years of SETI, we have zero hard evidence of alien civilizations, "cosmic wanderlust" resulting in Earth visitations, or UFOs being extraterrestrial in nature, despite - or perhaps because of - the expansiveness of the galaxy. Speculate on reasons for, and solutions to, this so-called Fermi Paradox.
Publisher
The Great Courses
Pub. Date
2017.
Language
English
Description
When radio astronomers discovered a sky full of small radio sources of unknown origin, they built telescopes using multiple antennas to try to understand them. Learn how and why interferometers were developed and how they have helped astronomers study quasars - those bright, star-like objects that scientists now know only occur in galaxies whose gas is falling into a supermassive black hole.
In Interlibrary Loan
Didn't find what you need? Items not owned by Jackson County Oregon can be requested from other Interlibrary Loan libraries to be delivered to your local library for pickup.
Didn't find it?
Can't find what you are looking for? Try our Materials Request Service. Submit Request