Ch. 26.5: The Expanding Universe
... Universe may be 90% + dark matter Why do we think Dark Matter exists? Galaxies are accelerating faster than they should be (based on the observable matter in the Universe). The acceleration due to gravity does not match up with the amount of matter that we can see. A = F/m (F = ma rearranged) tells ...
... Universe may be 90% + dark matter Why do we think Dark Matter exists? Galaxies are accelerating faster than they should be (based on the observable matter in the Universe). The acceleration due to gravity does not match up with the amount of matter that we can see. A = F/m (F = ma rearranged) tells ...
lecture06slides-schwarzschild
... Embedding Diagram Although the sheet looks flat in the picture, it isn’t really flat. The star’s mass curves 3D space inside and around the star. We can discover this curvature by making geometric measurements. • Straight lines, initially parallel, cross near the star’s center • Angles of a triangl ...
... Embedding Diagram Although the sheet looks flat in the picture, it isn’t really flat. The star’s mass curves 3D space inside and around the star. We can discover this curvature by making geometric measurements. • Straight lines, initially parallel, cross near the star’s center • Angles of a triangl ...
update : Feb.27,2014
... living organisms of human size and stars would be small and short-lived. If nuclear forces were a few percent weaker, only hydrogen would be stable: there would be no periodic table, no chemistry and no life. Some would argue that this fine-tuning of the universe, which seems so providential, is not ...
... living organisms of human size and stars would be small and short-lived. If nuclear forces were a few percent weaker, only hydrogen would be stable: there would be no periodic table, no chemistry and no life. Some would argue that this fine-tuning of the universe, which seems so providential, is not ...
Scale and Structure of the Universe
... the super cluster that holds our galaxy is called the Virgo super cluster. The diameter of our super cluster is approximately 100 million light years. That means it would take a beam of light 100 million years to get from one side to ...
... the super cluster that holds our galaxy is called the Virgo super cluster. The diameter of our super cluster is approximately 100 million light years. That means it would take a beam of light 100 million years to get from one side to ...
Position in Solar System ppt
... of its At the center of this spinning cloud, a small of dust and gas that were also collapsing. from the “bang” either collapsed million own years gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained wit ...
... of its At the center of this spinning cloud, a small of dust and gas that were also collapsing. from the “bang” either collapsed million own years gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained wit ...
ISP 205 Final Exam Seating Chart SIT IN CORRECT ROW
... Slide 9: Curve 4 question answered above. CMB is leftover radiation from when universe was filled by a fog of electrons, when temperature was 1000 times higher than it is now. It’s existence shows that U really did evolve from a previous hotter, denser state, so there really must have been a Big Ban ...
... Slide 9: Curve 4 question answered above. CMB is leftover radiation from when universe was filled by a fog of electrons, when temperature was 1000 times higher than it is now. It’s existence shows that U really did evolve from a previous hotter, denser state, so there really must have been a Big Ban ...
Higher Hubble`s Law and the Big Bang Answers
... It is assumed that there was a beginning as time started with the Big Bang. When the universe cooled sufficiently to form atoms, photons of radiation were able to travel distances which propagated the entire universe. Red shift which shows stars and galaxies are moving away from us in the continual ...
... It is assumed that there was a beginning as time started with the Big Bang. When the universe cooled sufficiently to form atoms, photons of radiation were able to travel distances which propagated the entire universe. Red shift which shows stars and galaxies are moving away from us in the continual ...
distance to the centre of the Milky Way.
... In ~1920s, other such systems were first recognized (as we will see) and called “Island universes.” This term was soon replaced by the word galaxies. ...
... In ~1920s, other such systems were first recognized (as we will see) and called “Island universes.” This term was soon replaced by the word galaxies. ...
Revision Guide (Unit 2 Module 5) - Pearson Schools and FE Colleges
... (or two or all of these might be true). Today, it is generally accepted that the universe is not infinite, and that it is expanding rather than static. The Cosmological Principle states that the universe has a generally uniform appearance. On a large scale, regions close to us are similar to the mos ...
... (or two or all of these might be true). Today, it is generally accepted that the universe is not infinite, and that it is expanding rather than static. The Cosmological Principle states that the universe has a generally uniform appearance. On a large scale, regions close to us are similar to the mos ...
Slide 1
... established, the other three still cannot be totally ignored. Ever since scientists proved the Big Bang to be the most plausible cosmological theory, and since it only focused more on how it might have all began, their attention started to shift to how the Universe would end. Thus, all 4 theories me ...
... established, the other three still cannot be totally ignored. Ever since scientists proved the Big Bang to be the most plausible cosmological theory, and since it only focused more on how it might have all began, their attention started to shift to how the Universe would end. Thus, all 4 theories me ...
Introduction to the Earth
... If the star was bigger than 30 times the mass of the sun The left over core becomes so dense that light can’t escape its gravity. Becomes a black hole. Grab any nearby matter and get bigger As matter falls in, it gives off x-rays. That’s how they find them ...
... If the star was bigger than 30 times the mass of the sun The left over core becomes so dense that light can’t escape its gravity. Becomes a black hole. Grab any nearby matter and get bigger As matter falls in, it gives off x-rays. That’s how they find them ...
General relativistic cosmology
... each particle (galaxy) in the Universe. Neglecting proper motions, the expansion has no effect on comoving coordinate values, and the coordinate distances between particles are forever fixed. In other words, the coordinate system expands with space itself. Proper distance: The instantaneous (dt = 0) ...
... each particle (galaxy) in the Universe. Neglecting proper motions, the expansion has no effect on comoving coordinate values, and the coordinate distances between particles are forever fixed. In other words, the coordinate system expands with space itself. Proper distance: The instantaneous (dt = 0) ...
Positions in the Solar System
... of its At the center of this spinning cloud, a small of dust and gas that were also collapsing. from the “bang” either collapsed million own years gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained wit ...
... of its At the center of this spinning cloud, a small of dust and gas that were also collapsing. from the “bang” either collapsed million own years gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained wit ...
Slide 1
... of its At the center of this spinning cloud, a small of dust and gas that were also collapsing. from the “bang” either collapsed million own years gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained wit ...
... of its At the center of this spinning cloud, a small of dust and gas that were also collapsing. from the “bang” either collapsed million own years gravity. after As the it did Big so, Bang, the matter thelarger gas star began to form. This star grew or stuck together to form the became contained wit ...
Milky Way galaxy - Uplift North Hills Prep
... universe, its origin, and its future. foundation: Einstein’s general theory of relativity and its theory of gravitation—for in the large-scale structure of the universe, gravity is the dominant force. ...
... universe, its origin, and its future. foundation: Einstein’s general theory of relativity and its theory of gravitation—for in the large-scale structure of the universe, gravity is the dominant force. ...
Slide 1
... Even before Hubble’s discovery of the expanding universe, the Russian Alexander Friedman, solving the Einstein's equations, proposed that the galaxies are moving away from each other, He proposed: The universe looks the same in each direction and for all observers wherever they are. How do we unders ...
... Even before Hubble’s discovery of the expanding universe, the Russian Alexander Friedman, solving the Einstein's equations, proposed that the galaxies are moving away from each other, He proposed: The universe looks the same in each direction and for all observers wherever they are. How do we unders ...
astronomy webquest…… explore the universe
... from your textbook. 2. How well do you know the word? Write your own definition of the nebula. Write a sentence about where you will find the word in use. Write five similar words that you can think of. ASTRONOMY WEBQUEST…… EXPLORE THE UNIVERSE Use the suggested websites to answer the following ques ...
... from your textbook. 2. How well do you know the word? Write your own definition of the nebula. Write a sentence about where you will find the word in use. Write five similar words that you can think of. ASTRONOMY WEBQUEST…… EXPLORE THE UNIVERSE Use the suggested websites to answer the following ques ...
Mathematical Paradoxes
... rooms and all the rooms are occupied. A new guest arrives can he be accommodated? ...
... rooms and all the rooms are occupied. A new guest arrives can he be accommodated? ...
The Cosmic Microwave Background and the Big Bang Theory of the
... A flat universe forms the dividing line between a closed universe and an open universe. It extends to infinity and expands forever, but the expansion gradually slows down and eventually just stops. But there is no big crunch. It would be somehow aesthetically pleasing if the universe were precisely ...
... A flat universe forms the dividing line between a closed universe and an open universe. It extends to infinity and expands forever, but the expansion gradually slows down and eventually just stops. But there is no big crunch. It would be somehow aesthetically pleasing if the universe were precisely ...
SGES 1302 INTRODUCTION TO EARTH SYSTEM
... The universe has no spatial boundary according to the standard Big Bang model, but nevertheless may be spatially finite (compact). This can be understood using a two-dimensional analogy: the surface of a sphere has no edge, but nonetheless has a finite area. ...
... The universe has no spatial boundary according to the standard Big Bang model, but nevertheless may be spatially finite (compact). This can be understood using a two-dimensional analogy: the surface of a sphere has no edge, but nonetheless has a finite area. ...
Cosmic Times - Klenk Astronomy
... Gravitation was confirmed when the light from stars was bent around the sun • Einstein’s model also predicted that the universe is either expanding or contracting • He didn’t like this so he added a universal (or cosmological ...
... Gravitation was confirmed when the light from stars was bent around the sun • Einstein’s model also predicted that the universe is either expanding or contracting • He didn’t like this so he added a universal (or cosmological ...
Shape of the universe
The shape of the universe is the local and global geometry of the Universe, in terms of both curvature and topology (though, strictly speaking, the concept goes beyond both). The shape of the universe is related to general relativity which describes how spacetime is curved and bent by mass and energy.There is a distinction between the observable universe and the global universe. The observable universe consists of the part of the universe that can, in principle, be observed due to the finite speed of light and the age of the universe. The observable universe is understood as a sphere around the Earth extending 93 billion light years (8.8 *1026 meters) and would be similar at any observing point (assuming the universe is indeed isotropic, as it appears to be from our vantage point).According to the book Our Mathematical Universe, the shape of the global universe can be explained with three categories: Finite or infinite Flat (no curvature), open (negative curvature) or closed (positive curvature) Connectivity, how the universe is put together, i.e., simply connected space or multiply connected.There are certain logical connections among these properties. For example, a universe with positive curvature is necessarily finite. Although it is usually assumed in the literature that a flat or negatively curved universe is infinite, this need not be the case if the topology is not the trivial one.The exact shape is still a matter of debate in physical cosmology, but experimental data from various, independent sources (WMAP, BOOMERanG and Planck for example) confirm that the observable universe is flat with only a 0.4% margin of error. Theorists have been trying to construct a formal mathematical model of the shape of the universe. In formal terms, this is a 3-manifold model corresponding to the spatial section (in comoving coordinates) of the 4-dimensional space-time of the universe. The model most theorists currently use is the so-called Friedmann–Lemaître–Robertson–Walker (FLRW) model. Arguments have been put forward that the observational data best fit with the conclusion that the shape of the global universe is infinite and flat, but the data are also consistent with other possible shapes, such as the so-called Poincaré dodecahedral space and the Picard horn.