16. Hubble`s Law and Dark Matter
... 16.1 Dark Matter in the Universe • Galaxy mass measurements show that galaxies need between 3 and 10 times more mass than can be observed to explain their rotation curves. • The discrepancy is even larger in galaxy clusters, which need 10 to 100 times more mass. The total needed is more than the su ...
... 16.1 Dark Matter in the Universe • Galaxy mass measurements show that galaxies need between 3 and 10 times more mass than can be observed to explain their rotation curves. • The discrepancy is even larger in galaxy clusters, which need 10 to 100 times more mass. The total needed is more than the su ...
Gamma-ray burst has highest redshift yet seen
... On 23 April, NASA’s Swift orbiter detected the most distant and therefore earliest stellar object ever seen.1 With a record redshift z of 8.26, the gamma-ray burst recorded by Swift is presumed to manifest the collapse of a rapidly spinning massive star—a collapsar—to a black hole about 625 million ...
... On 23 April, NASA’s Swift orbiter detected the most distant and therefore earliest stellar object ever seen.1 With a record redshift z of 8.26, the gamma-ray burst recorded by Swift is presumed to manifest the collapse of a rapidly spinning massive star—a collapsar—to a black hole about 625 million ...
the speed of dark energy
... “No cable,” Boris said. “Dark energy permeates everything, so it goes through Earth.” “Better yet,” said the professor. “Write this up and we’ll patent it. Investors will be pounding on the door. I’ll double your salary.” After Professor Harding left, Boris fiddled with the display. Curious how much ...
... “No cable,” Boris said. “Dark energy permeates everything, so it goes through Earth.” “Better yet,” said the professor. “Write this up and we’ll patent it. Investors will be pounding on the door. I’ll double your salary.” After Professor Harding left, Boris fiddled with the display. Curious how much ...
Cosmology Notes - University of Florida Astronomy
... with those observed locally. Within our own Galaxy, period changes for binary pulsars are consistent with the slowdown predicted by General Relativity as a result of gravitational radiation. On a much more distant scale, the light curves of type Ia supernovae are similar in all directions out to z ≈ ...
... with those observed locally. Within our own Galaxy, period changes for binary pulsars are consistent with the slowdown predicted by General Relativity as a result of gravitational radiation. On a much more distant scale, the light curves of type Ia supernovae are similar in all directions out to z ≈ ...
ASTR 340 - TerpConnect
... “How was the universe created and evolved to its present stage?” “Can we learn more about the basic laws of physics from the observable effects they had on the structure of the universe?” “How did galaxies and clusters of galaxies formed and how they evolved?” “Can massive stars or galaxy size aggre ...
... “How was the universe created and evolved to its present stage?” “Can we learn more about the basic laws of physics from the observable effects they had on the structure of the universe?” “How did galaxies and clusters of galaxies formed and how they evolved?” “Can massive stars or galaxy size aggre ...
Document
... • Theories incorporating this idea go back over 80 years, but string theory is new in requiring more dimensions. ...
... • Theories incorporating this idea go back over 80 years, but string theory is new in requiring more dimensions. ...
P1 09 Red Shift - Animated Science
... Satellites fitted with various telescopes orbit the Earth. These telescopes detect different types of electromagnetic radiation. Why are telescopes that detect different types of electromagnetic waves used to observe the Universe? ...
... Satellites fitted with various telescopes orbit the Earth. These telescopes detect different types of electromagnetic radiation. Why are telescopes that detect different types of electromagnetic waves used to observe the Universe? ...
UNIT_5_Reach_for_the..
... animations of stages in the Big Bang. Know that main stages in Activity 32 - (Matter in the Universe). the history of the universe, Label diagrams. Discuss main stages of beginning at the Big Bang. the Big Bang & misconceptions. Be aware of the controversy Ask students to recall the possible fates o ...
... animations of stages in the Big Bang. Know that main stages in Activity 32 - (Matter in the Universe). the history of the universe, Label diagrams. Discuss main stages of beginning at the Big Bang. the Big Bang & misconceptions. Be aware of the controversy Ask students to recall the possible fates o ...
course - HSCPhysics
... The Universe began with a singularity in space-time. After the initial explosion, the Universe started to expand, cool and condense, forming matter. As part of this ongoing process the Sun and the Solar System were formed over 4x109 years ago from a gas cloud which resulted from a supernova explosio ...
... The Universe began with a singularity in space-time. After the initial explosion, the Universe started to expand, cool and condense, forming matter. As part of this ongoing process the Sun and the Solar System were formed over 4x109 years ago from a gas cloud which resulted from a supernova explosio ...
Laser Interferometer Space Antenna “Listening to the Universe with
... Apply Kepler’s law to the observed gas motion and determine the mass of the central object: ...
... Apply Kepler’s law to the observed gas motion and determine the mass of the central object: ...
Ch 33) Astrophysics and Cosmology
... Los Angeles, California, then the world’s largest. Hubble demonstrated that these objects were indeed extragalactic because of their great distances. The distance to our nearest large galaxy,‡ Andromeda, is over 2 million light-years, a distance 20 times greater than the diameter of our Galaxy. It s ...
... Los Angeles, California, then the world’s largest. Hubble demonstrated that these objects were indeed extragalactic because of their great distances. The distance to our nearest large galaxy,‡ Andromeda, is over 2 million light-years, a distance 20 times greater than the diameter of our Galaxy. It s ...
4550-15Lecture33
... Once the stellar core has been largely converted to Fe, a critical phase is reached: the balance between thermal expansion and gravitational collapse is broken. The stage is now set for the catastrophic death of the star: a supernova explosion, the ultimate fate of stars with masses greater than abo ...
... Once the stellar core has been largely converted to Fe, a critical phase is reached: the balance between thermal expansion and gravitational collapse is broken. The stage is now set for the catastrophic death of the star: a supernova explosion, the ultimate fate of stars with masses greater than abo ...
Astroparticle physics A.M. van den Berg () O. Scholten
... If (t=0) > 1 the Universe would have recollapsed at once If (t=0) < 1 the Universe would have cooled very quickly HORIZON PROBLEM Regions on the CMB sky separated by more than 1o had no time to interact, yet their temperature is the same to 100 ppm What is needed An initial condition of the Univer ...
... If (t=0) > 1 the Universe would have recollapsed at once If (t=0) < 1 the Universe would have cooled very quickly HORIZON PROBLEM Regions on the CMB sky separated by more than 1o had no time to interact, yet their temperature is the same to 100 ppm What is needed An initial condition of the Univer ...
presentation source
... and grow very massive, maybe millions of MO •If galaxy massive enough, or through encounters with other galaxies, could grow even more massive •As galaxy ages, available mass drops and activity diminishes ...
... and grow very massive, maybe millions of MO •If galaxy massive enough, or through encounters with other galaxies, could grow even more massive •As galaxy ages, available mass drops and activity diminishes ...
3 Introduction to Modified Gravity: From the Cosmic Speedup Problem to
... Universe, followed by huge amounts of unseen matter which seems necessary to explain the anomalous rotation curves of galaxies, gravitational lensing, and the formation of structure via gravitational instability. One of the goals of this chapter is to provide the reader with elementary concepts and ...
... Universe, followed by huge amounts of unseen matter which seems necessary to explain the anomalous rotation curves of galaxies, gravitational lensing, and the formation of structure via gravitational instability. One of the goals of this chapter is to provide the reader with elementary concepts and ...
cosmo_01_overview - Mullard Space Science Laboratory
... dark matter, growth of large scale structure ...
... dark matter, growth of large scale structure ...
Andromeda Nebula Lies Outside Milky Way Galaxy
... curves this space-time and that the curvature controls the natural motions of objects in space. Einstein's theory also suggested the expansion of the Universe, but Einstein didn't believe this could be correct. In 1917 he added a new term to his equations, the "cosmological constant." This constant ...
... curves this space-time and that the curvature controls the natural motions of objects in space. Einstein's theory also suggested the expansion of the Universe, but Einstein didn't believe this could be correct. In 1917 he added a new term to his equations, the "cosmological constant." This constant ...
Exploring Space—The Universe: The Vast
... 5. Discuss the Big Bang theory with the class. According to scientists, when did the “Big Bang” occur? (12 to 13 billion years ago.) How has the Hubble telescope been able to prove this theory? Explain how the Hubble telescope has been able to detect that galaxies are gradually moving away from each ...
... 5. Discuss the Big Bang theory with the class. According to scientists, when did the “Big Bang” occur? (12 to 13 billion years ago.) How has the Hubble telescope been able to prove this theory? Explain how the Hubble telescope has been able to detect that galaxies are gradually moving away from each ...
RobinCollins_CPiS_Ca..
... Type 1: Livability/Discoverability-Optimality Fine-tuning Livability/Discoverability-Optimality Fine-tuning. This sort of fine-tuning of a parameter occurs if given the basic overarching principles of physics and the current mathematical form of the laws: (i) the parameter is within its livability- ...
... Type 1: Livability/Discoverability-Optimality Fine-tuning Livability/Discoverability-Optimality Fine-tuning. This sort of fine-tuning of a parameter occurs if given the basic overarching principles of physics and the current mathematical form of the laws: (i) the parameter is within its livability- ...
Non-standard cosmology
A non-standard cosmology is any physical cosmological model of the universe that has been, or still is, proposed as an alternative to the Big Bang model of standard physical cosmology. In the history of cosmology, various scientists and researchers have disputed parts or all of the Big Bang due to a rejection or addition of fundamental assumptions needed to develop a theoretical model of the universe. From the 1940s to the 1960s, the astrophysical community was equally divided between supporters of the Big Bang theory and supporters of a rival steady state universe. It was not until advances in observational cosmology in the late 1960s that the Big Bang would eventually become the dominant theory, and today there are few active researchers who dispute it.The term non-standard is applied to any cosmological theory that does not conform to the scientific consensus, but is not used in describing alternative models where no consensus has been reached, and is also used to describe theories that accept a ""big bang"" occurred but differ as to the detailed physics of the origin and evolution of the universe. Because the term depends on the prevailing consensus, the meaning of the term changes over time. For example, hot dark matter would not have been considered non-standard in 1990, but would be in 2010. Conversely, a non-zero cosmological constant resulting in an accelerating universe would have been considered non-standard in 1990, but is part of the standard cosmology in 2010.