Catalog Search Results
Pub. Date
2017.
Language
English
Description
Learn about techniques to separate signals originating in receivers from signals originating from outer space. Using a unique antenna located in New Jersey, we'll see how two radio astronomers with curiosity, persistence, and some manual labor, detected the faint radio signals from the big bang, the oldest electromagnetic radiation that can be detected.
Pub. Date
2015.
Language
English
Description
Chart the history of exoplanet hunting-from a famous false signal in the 1960s, through ambiguous discoveries in the 1980s, to the big breakthrough in the 1990s, when dozens of exoplanets turned up. Astronomers were stunned to find planets unlike anything in the solar system..
Pub. Date
2013.
Language
English
Description
Delve into the search for extraterrestrial life, or SETI, as the method used to gauge the likelihood of intelligent communicating civilizations is known. Look closely at the Drake Equation - the mathematical rubric commonly used in the field of SETI - and consider the challenge of communicating across our enormous galaxy.
Pub. Date
2017.
Language
English
Description
When young engineer Karl Jansky was tasked to find natural radio sources that could interfere with commercial transatlantic radio communications, radio astronomy was born. His work led to the discovery of synchrotron radiation. But it would be decades before scientists understood what these earliest radio astronomers had detected - cosmic rays and magnetic fields.
Pub. Date
2023.
Language
English
Description
Examine Saturn through the eyes of the Cassini probe, which has been orbiting the ringed planet since 2004, taking spectacular pictures of Saturn's cloud tops, moons, and especially the enigmatic ring system. Examine competing theories for the origin of this complex circular band.
Pub. Date
2013.
Language
English
Description
For something to be "living," it generally must use energy to drive chemical reactions, be capable of reproduction, and undergo some degree of evolution. Sort through science's best educated guesses for how and why life sprang from nonliving matter. Watch an animation of protocells growing and splitting to replicate genetic information.
Pub. Date
2017.
Language
English
Description
Study the astronomical significance of Egypt's Great Pyramid. How did its builders achieve such phenomenal accuracy in the pyramid's alignment to the cardinal directions? Were its air shafts intended to point at stars of special importance? Also evaluate modern claims for the mystical power of pyramids.
Pub. Date
2017.
Language
English
Description
Learn about the newest radio telescopes and the exhilarating questions they plan to address: Did life begin in space? What is dark matter? And a new question that has just arisen in the past few years: What are fast radio bursts? No matter how powerful these new telescopes are, radio astronomers will continue pushing the limits to tell us more and more about the universe that is our home.
Pub. Date
2017.
Language
English
Description
Travel to Chaco Canyon, New Mexico, where the Anasazi culture practiced sky-centered rituals a thousand years ago. Look for evidence of their astronomical knowledge, examine their many "sun daggers," and probe the controversial pictograph thought to depict the Crab Nebula supernova explosion in 1054 AD.
Pub. Date
2017.
Language
English
Description
Before there were stars and planets, before there were galaxies, there was hydrogen - and we still have more hydrogen today than any other element. Understanding the quantum physics of this simplest atomic structure, and using the Doppler shift and models of differential rotation in the Milky Way, astronomers have made myriad astounding discoveries about the universe. It all starts with hydrogen.
Pub. Date
2017.
Language
English
Description
Why were the motions of the Sun, Moon, and stars so important to ancient people? Investigate key astronomical directions noticed by all cultures. Then embark on your study of Stonehenge, seeing how it gave birth to the field of archaeoastronomy and to some very curious modern theories.
Pub. Date
2017.
Language
English
Description
Ptolemy has been called the greatest astronomer of antiquity. But was he? Evaluate his reputation by focusing on his star catalog, celestial coordinate system, and magnitude scale. Then gauge the extent of his influence over later astronomers, which lasted over a thousand years.
Pub. Date
2017.
Language
English
Description
Have you ever looked up to Orion on a dark winter's night and noticed a fuzzy patch near the center of the constellation? You're looking at the Orion nebula, a "nursery" where stars are born every year. Learn why ionization occurs in these H II regions and how this hot plasma produces some of the most beautiful objects in the sky.
Pub. Date
2013.
Language
English
Description
How do you make a planet? Look at what is currently known about the process by which our solar system's planets formed from billions of small planetesimals, as well as how this process left the universe teaming with asteroids and comets that play an important role in life on Earth.
Pub. Date
2017.
Language
English
Description
Radio source counts have led to great discoveries about the universe, even though each individual radio source isn't fully understood. Between massive black holes and starbursts, scientists relying in part on astronomical surveys now believe galaxies can have different evolutionary tracks and histories. And the universe itself? It seems to be not only evolving, but evolving through stages.
Pub. Date
2023.
Language
English
Description
Travel to the most exotic sector of the Milky Way, the galactic center, which has a black hole four million times more massive than the sun and is orbited by hot gas and giant stars. View this violent region at multiple wavelengths using the most advanced telescopes of our day.
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.
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.
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.
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