Probing the Early Universe with Distant Galaxies
... possibility of discovering galaxies in the first billion years of the universe's history. Some of these galaxies have been followed up with observations undertaken from the ground to obtain their spectra and infer further clues about the universe during its infancy. In particular, a lot of effort ha ...
... possibility of discovering galaxies in the first billion years of the universe's history. Some of these galaxies have been followed up with observations undertaken from the ground to obtain their spectra and infer further clues about the universe during its infancy. In particular, a lot of effort ha ...
1.1 Safety in the Science Classroom
... » Blue shift is the opposite; the star is getting closer. ...
... » Blue shift is the opposite; the star is getting closer. ...
Beyond the Big Bang The Universe
... 7. According to early religion, if God created the universe, _________ MUST be in the middle. 8. The first person to put the sun at the center of the solar system and say that Earth rotates on an axis was ______________________. 9. Kepler said that planets don’t go in perfect circles, they go in ___ ...
... 7. According to early religion, if God created the universe, _________ MUST be in the middle. 8. The first person to put the sun at the center of the solar system and say that Earth rotates on an axis was ______________________. 9. Kepler said that planets don’t go in perfect circles, they go in ___ ...
Going to the End of the Earth to Learn About the Beginning of the
... ever taken Over 10,000 galaxies in this image! ...
... ever taken Over 10,000 galaxies in this image! ...
dark matter - Aurora City Schools
... energy) was in one small point (singularity) that “blew up” and is still moving outwards today • Not really an explosion, so much as a very rapid expansion…like blowing up a balloon • About 13.7 billion years ago • Microwave radiation detected in the 1960’s supports this theory. It’s left over energ ...
... energy) was in one small point (singularity) that “blew up” and is still moving outwards today • Not really an explosion, so much as a very rapid expansion…like blowing up a balloon • About 13.7 billion years ago • Microwave radiation detected in the 1960’s supports this theory. It’s left over energ ...
Image of the day
... equations to describe that expansion and the constant that defines the rate of expansion. In 1929, Edwin Hubble, confirmed the relationship and refined the value of the constant now known as Hubble’s Constant (H0). ...
... equations to describe that expansion and the constant that defines the rate of expansion. In 1929, Edwin Hubble, confirmed the relationship and refined the value of the constant now known as Hubble’s Constant (H0). ...
The Big Bang Theory
... expansion from a single point that was infinitely small, infinitely hot, and infinitely dense. ...
... expansion from a single point that was infinitely small, infinitely hot, and infinitely dense. ...
Quiz
... ten to twenty billion years ago and began expanding in all directions _____ 3. galaxy moving away from Earth _____ 4. apparent shift toward shorter wavelengths of light when a luminous object moves toward the viewer ...
... ten to twenty billion years ago and began expanding in all directions _____ 3. galaxy moving away from Earth _____ 4. apparent shift toward shorter wavelengths of light when a luminous object moves toward the viewer ...
26.5 Guided Notes
... incredibly hot region smaller than the period at the end of this sentence then exploded in an instant 13.7 billion years ago. ...
... incredibly hot region smaller than the period at the end of this sentence then exploded in an instant 13.7 billion years ago. ...
Slide 1
... By mid 20th century -- 3 models or theories Big Bang -- Father LeMaitre, George Gamow Oscillating Universe Steady State -- Fred Hoyle ...
... By mid 20th century -- 3 models or theories Big Bang -- Father LeMaitre, George Gamow Oscillating Universe Steady State -- Fred Hoyle ...
Big Bang
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution. The model accounts for the fact that the universe expanded from a very high density and high temperature state, and offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background, large scale structure, and Hubble's Law. If the known laws of physics are extrapolated beyond where they are valid, there is a singularity. Modern measurements place this moment at approximately 13.8 billion years ago, which is thus considered the age of the universe. After the initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later simple atoms. Giant clouds of these primordial elements later coalesced through gravity to form stars and galaxies.Since Georges Lemaître first noted, in 1927, that an expanding universe might be traced back in time to an originating single point, scientists have built on his idea of cosmic expansion. While the scientific community was once divided between supporters of two different expanding universe theories, the Big Bang and the Steady State theory, accumulated empirical evidence provides strong support for the former. In 1929, from analysis of galactic redshifts, Edwin Hubble concluded that galaxies are drifting apart, important observational evidence consistent with the hypothesis of an expanding universe. In 1965, the cosmic microwave background radiation was discovered, which was crucial evidence in favor of the Big Bang model, since that theory predicted the existence of background radiation throughout the universe before it was discovered. More recently, measurements of the redshifts of supernovae indicate that the expansion of the universe is accelerating, an observation attributed to dark energy's existence. The known physical laws of nature can be used to calculate the characteristics of the universe in detail back in time to an initial state of extreme density and temperature.