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Using crisp images and lifelike animations, this program introduces students to the intriguing realm of stars and galaxies. The main characteristics of galaxies and stars are discussed. Special attention is given to the features of stars, including size, temperature, and brightness. The life cycle of a star is also highlighted, as are the tools used by astronomers to study space. Additional concepts and terminology illustrated in the video include: universe, telescope, satellites, constellations, star color, spectrum, gas, light-year, and black hole.
(Source: DCMP)
In this episode, Dr. Varoujan Gorjian discusses what happens when galaxies collide. Usually new stars form due to the impact of gases on one another. Part of the "Ask an Astronomer" series.
Visible light, which can be seen with human 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 an array of radio telescopes to detect and study radio waves from space. ALMA is an advanced tool for studying very old stars and galaxies. These objects now are seen at great cosmic distances, with most of their light stretched out to millimeter and sub-millimeter wavelengths by the expansion of the universe. ALMA provides the unprecedented ability to study the processes of star and planet formation.
In this episode, scientist Steve Lord explains the relationship between gravity and the shape of galaxies. Gravitational forces from the galaxy's core causes all the stars to rotate. This rotation causes spiral waves. Part of the "Ask an Astronomer" series.
Astronomer Steve Eikenberry at the University of Florida is on the hunt for black holes. With support from the National Science Foundation, he hopes to learn more about how particular black holes evolve, why there seem to be supermassive black holes at the center of most if not all galaxies, and what powers them.
This program discusses the concept of the expanding universe. Calculations by astrophysicists show that the cosmos seems to be speeding up. The 50-billion galaxies thought to comprise our universe are rapidly moving farther apart. Scientists are working to understand the nature of space and the purpose of dark energy and dark matter related to the expanding universe.
Depicts the different stages in the birth and death of stars, including the sun. There are 100 billion stars in the Milky Way galaxy alone, and there are 100 billion galaxies. Provides an overview of radiated energy, which is in all wavelengths; nuclear fusion; and fierce magnetic fields, which create all solar events. Explains that the length of a star's life and how it dies are determined by gravity and how gravity is proportional to size.
Dr. Varoujan Gorjian discusses the ways galaxies might die. They could collide with one another, and sometime they run out of energy. Part of the "Ask an Astronomer" series.
There isn't an easy answer to the question: What is the nearest galaxy to the Milky Way? The Andromeda Galaxy is the closest complete galaxy; however, astronomers have found several dwarf galaxies orbiting the Milky Way. Part of the "Ask an Astronomer" series.
In this episode, scientist Steve Lord discusses the findings of astronomer Edmond Halley, and his discoveries related to the movement of stars. Halley used ancient Greek records to prove that stars move as they orbit within their galaxies. Part of the "Ask an Astronomer" series.
Part of a series that features a wide variety of video footage, photographs, diagrams and colorful, animated graphics and labels. Begins with a simple definition of the term and concludes with a critical thinking question. For this particular video, students will focus on the term galaxy. Part of the Science Video Vocab Series.
The Big Bang theory is currently the most popular scientific theory for the origin of the universe. It describes how the universe emerged from an enormously dense and hot state about 13.7 billion years ago and how the universe is still expanding from that point. This theory helps scientists explain the formation of all the galaxies, stars, and planets.
Ancient civilizations such as the Babylonians, the Chinese and the Greeks studied the stars without the benefit of telescopes and yet identified patterns of stars that are still used today. These early scientists collected the first data in the science of astronomy. This program provides students with a summary of the history of astronomy and highlights many important astronomers.
Matthew Schneps is a researcher at Harvard University with a doctorate in physics from the Massachusetts Institute of Technology (MIT). He also happens to have dyslexia, so reading has always been a challenge for him. That is, until he got a smartphone. Schneps soon found that for him, a smartphone was easier to read than a paper or a book. But, was it just him? Or, had he stumbled onto something that could help others with dyslexia? Part of the National Science Foundation Series “Science Nation.”
