young science communicator`s competition
... the beginning and the end and a youthful voice in between, as directed. The voice of Shapley should be a young, enthusiastic man whereas Curtis should sound older and more distinguished.] NARRATOR [old voice]: The year was 1920, the place: the Smithsonian, Washington, the question: what is the size ...
... the beginning and the end and a youthful voice in between, as directed. The voice of Shapley should be a young, enthusiastic man whereas Curtis should sound older and more distinguished.] NARRATOR [old voice]: The year was 1920, the place: the Smithsonian, Washington, the question: what is the size ...
High velocity clouds (v > 90 km/s), up to 108 M_sun in total Seen at
... High velocity clouds (v > 90 km/s), up to 108 M_sun in total! Seen at 21 cm, with high velocities up to 500 km/s. Mixed metallicity. ! Many partially ionized, and can contribute up to 1 M_sun/year (Lehner & ...
... High velocity clouds (v > 90 km/s), up to 108 M_sun in total! Seen at 21 cm, with high velocities up to 500 km/s. Mixed metallicity. ! Many partially ionized, and can contribute up to 1 M_sun/year (Lehner & ...
Modern Telescopes and Ancient Skies
... How is the Universe put together? The Wilkinson Microwave Anisotropy Probe tells us about the state of the Universe 400,000 years after the Big ...
... How is the Universe put together? The Wilkinson Microwave Anisotropy Probe tells us about the state of the Universe 400,000 years after the Big ...
ASTRONOMY WEBQUEST…… EXPLORE THE UNIVERSE
... A pulsar is a neutron star which emits beams of radiation that sweep through the earth's line of sight. Like a black hole, it is an endpoint to stellar evolution. The "pulses" of high-energy radiation we see from a pulsar are due to a misalignment of the neutron star's rotation axis and its magnetic ...
... A pulsar is a neutron star which emits beams of radiation that sweep through the earth's line of sight. Like a black hole, it is an endpoint to stellar evolution. The "pulses" of high-energy radiation we see from a pulsar are due to a misalignment of the neutron star's rotation axis and its magnetic ...
Document
... Ellipticals: Violent formation, all gas used up quickly, rotation destroyed Spirals: Formed more sedately, slow recycling of gas, rotation maintained What does this mean for Andromeda and the Milky Way who meet in 3 billion years? ...
... Ellipticals: Violent formation, all gas used up quickly, rotation destroyed Spirals: Formed more sedately, slow recycling of gas, rotation maintained What does this mean for Andromeda and the Milky Way who meet in 3 billion years? ...
The Milky Way Galaxy (ch. 23)
... formation and evolution of our galaxy (Fig.23.14)—halo forms first in nearly spherical shape, rest of gas collapsed to disk which has formed stars continuously since that time. (Think about how above properties suggest this.) More recently it was discovered that our Galaxy has a weak but detectable ...
... formation and evolution of our galaxy (Fig.23.14)—halo forms first in nearly spherical shape, rest of gas collapsed to disk which has formed stars continuously since that time. (Think about how above properties suggest this.) More recently it was discovered that our Galaxy has a weak but detectable ...
Measuring the masses of clusters
... Masses of clusters from x-ray gas: •! If we assume the cluster is in hydrostatic equilibrium, #=density of the gas, P=pressure ...
... Masses of clusters from x-ray gas: •! If we assume the cluster is in hydrostatic equilibrium, #=density of the gas, P=pressure ...
Chapter 19. Mapping the Universe from Herschel to Sloan
... Harvard, focused attention on massive clusters of stars, known as globular clusters. These could be seen to greater distances than individual stars and were also located primarily out of the plane of the Milky Way galaxy meaning that they were much less affected by interstellar dust. Shapley plotted ...
... Harvard, focused attention on massive clusters of stars, known as globular clusters. These could be seen to greater distances than individual stars and were also located primarily out of the plane of the Milky Way galaxy meaning that they were much less affected by interstellar dust. Shapley plotted ...
Universe Learning Targets and Vocabulary
... 8. Illustrate and describe the 3 main types of galaxies. 9. What type of galaxy is the Milky Way galaxy? (TEK 8.8B) Recognize that the Sun is a medium-sized star near the edge of a disc-shaped galaxy of stars and the Sun is many thousands of times closer to Earth than any other star. 10. Describe th ...
... 8. Illustrate and describe the 3 main types of galaxies. 9. What type of galaxy is the Milky Way galaxy? (TEK 8.8B) Recognize that the Sun is a medium-sized star near the edge of a disc-shaped galaxy of stars and the Sun is many thousands of times closer to Earth than any other star. 10. Describe th ...
Messier 87
Messier 87 (also known as Virgo A or NGC 4486, and generally abbreviated to M87) is a supergiant elliptical galaxy in the constellation Virgo. One of the most massive galaxies in the local universe, it is notable for its large population of globular clusters—M87 contains about 12,000 compared to the 150-200 orbiting the Milky Way—and its jet of energetic plasma that originates at the core and extends outward at least 1,500 parsecs (4,900 light-years), travelling at relativistic speed. It is one of the brightest radio sources in the sky, and is a popular target for both amateur astronomy observations and professional astronomy study.French astronomer Charles Messier discovered M87 in 1781, cataloguing it as a nebulous feature while searching for objects that would confuse comet hunters. The second brightest galaxy within the northern Virgo Cluster, M87 is located about 16.4 million parsecs (53.5 million light-years) from Earth. Unlike a disk-shaped spiral galaxy, M87 has no distinctive dust lanes. Instead, it has an almost featureless, ellipsoidal shape typical of most giant elliptical galaxies, diminishing in luminosity with distance from the centre. Forming around one sixth of M87's mass, the stars in this galaxy have a nearly spherically symmetric distribution, their density decreasing with increasing distance from the core. At the core is a supermassive black hole, which forms the primary component of an active galactic nucleus. This object is a strong source of multiwavelength radiation, particularly radio waves. M87's galactic envelope extends out to a radius of about 150 kiloparsecs (490,000 light-years), where it has been truncated—possibly by an encounter with another galaxy. Between the stars is a diffuse interstellar medium of gas that has been chemically enriched by elements emitted from evolved stars.