Modification of Newton`s law of gravity at very large distances
... classical level the topology is always defined and does not change). This means that the topology of space must not be a direct observable, and the only chance to keep the information on the topology is to allow all the fields (which are specified on the background space) to be multivalued. The corr ...
... classical level the topology is always defined and does not change). This means that the topology of space must not be a direct observable, and the only chance to keep the information on the topology is to allow all the fields (which are specified on the background space) to be multivalued. The corr ...
Galaxies - science1d
... •The most distant galaxies are 15 million ly away •When light left them, the ...
... •The most distant galaxies are 15 million ly away •When light left them, the ...
Comets and Asteroids
... famous part of a comet is the tail, which will be gone into depth in the next slide. There are two different types of comets, long-period and short-period. Short- period comets have as short a orbit as 20 years, while long-period comets can be have an orbit as long as 2,000 years!!!!!! ...
... famous part of a comet is the tail, which will be gone into depth in the next slide. There are two different types of comets, long-period and short-period. Short- period comets have as short a orbit as 20 years, while long-period comets can be have an orbit as long as 2,000 years!!!!!! ...
Dec. 6 - UF Physics
... Origins of the Big Bang Theory • George Gamow (1948) suggested that if the universe was created with a “hot Big Bang”, then: – Various elements, such as H and He, would be produced for a few minutes immediately after the Big Bang due to the extremely high temperatures and density of the universe at ...
... Origins of the Big Bang Theory • George Gamow (1948) suggested that if the universe was created with a “hot Big Bang”, then: – Various elements, such as H and He, would be produced for a few minutes immediately after the Big Bang due to the extremely high temperatures and density of the universe at ...
CosmologyL1
... satellite, shows the furthest light we can see. It is also the oldest: The light was emitted shortly after the Big Bang, and has been traveling through space for 13.7 billion years to us. In this "baby picture" of the universe, the red and yellow patches are regions that are just a few millionths of ...
... satellite, shows the furthest light we can see. It is also the oldest: The light was emitted shortly after the Big Bang, and has been traveling through space for 13.7 billion years to us. In this "baby picture" of the universe, the red and yellow patches are regions that are just a few millionths of ...
2012 - Astronomy Now
... 3; 73 ��� How fast can a star rotate? 4; 75 ��� Whatever happened to Hagen’s cosmic clouds? 4; 75 ��� Who was the Astronomer Royal who in 1957 described spaceflight as “utter bilge”? 5; 75 ��� What are the units of gravity? 5; 75 ��� Why do craters often look like hills in photographs of the Moon? 6 ...
... 3; 73 ��� How fast can a star rotate? 4; 75 ��� Whatever happened to Hagen’s cosmic clouds? 4; 75 ��� Who was the Astronomer Royal who in 1957 described spaceflight as “utter bilge”? 5; 75 ��� What are the units of gravity? 5; 75 ��� Why do craters often look like hills in photographs of the Moon? 6 ...
Dark Matter Mathematics
... BUT . . . Velocities do not drop off Result: Dark Matter mass is about 10x Luminous Matter mass ...
... BUT . . . Velocities do not drop off Result: Dark Matter mass is about 10x Luminous Matter mass ...
When you look up at the night sky, thousands of objects
... holes. Hawking communicates his ideas through an electronic device that converts the movements of muscles in his cheeks into words. Hawking argues that black holes were created at the birth of the universe and have been with us ever since. In the beginning, they may have been no larger than single p ...
... holes. Hawking communicates his ideas through an electronic device that converts the movements of muscles in his cheeks into words. Hawking argues that black holes were created at the birth of the universe and have been with us ever since. In the beginning, they may have been no larger than single p ...
A WALK THROUGH THE SOLAR SYSTEM
... Ancient astronomers observed points of light that appeared to move among the stars, and they called these objects planets, meaning wanderers. They were named after Roman legends. Jupiter was the king of the gods, Mars the god of war, Mercury was messenger of the gods, Venus was the god of beauty, an ...
... Ancient astronomers observed points of light that appeared to move among the stars, and they called these objects planets, meaning wanderers. They were named after Roman legends. Jupiter was the king of the gods, Mars the god of war, Mercury was messenger of the gods, Venus was the god of beauty, an ...
Star - University of Pittsburgh
... The colors of various types of stars Observed changes in the diameter, brightness, and color of a star at different times during its life The stellar populations of a spiral galaxy (like the Milky Way) ...
... The colors of various types of stars Observed changes in the diameter, brightness, and color of a star at different times during its life The stellar populations of a spiral galaxy (like the Milky Way) ...
PC2491 Examples 2
... where Ro is the distance from the galactic centre to the Sun, o is the angular velocity of the Sun and (r) is the angular velocity at radius r. An H1 cloud in the galactic plane at l=30o is observed to have a velocity relative to the local standard of rest of +80 km s-1. Assume the galactic rotati ...
... where Ro is the distance from the galactic centre to the Sun, o is the angular velocity of the Sun and (r) is the angular velocity at radius r. An H1 cloud in the galactic plane at l=30o is observed to have a velocity relative to the local standard of rest of +80 km s-1. Assume the galactic rotati ...
The Sun is a mass of Incandescent Gas
... The Sun and other stars are really only roughly in equilibrium. The Sun is extremely dynamic, and has storms larger than the Earth. ...
... The Sun and other stars are really only roughly in equilibrium. The Sun is extremely dynamic, and has storms larger than the Earth. ...
Chapter 19
... How the Moon Formed There are several theories for how the moon formed. Some Thought a separate body was captured by Earth’s gravity. Others thought the moon formed at the same time as Earth. When Earth was still forming it was molten, or heated to an almost liquid state. A Mar-sized body struck Ear ...
... How the Moon Formed There are several theories for how the moon formed. Some Thought a separate body was captured by Earth’s gravity. Others thought the moon formed at the same time as Earth. When Earth was still forming it was molten, or heated to an almost liquid state. A Mar-sized body struck Ear ...
Chapter 16 - "The Universe"
... – The classification is based on apparent magnitude scale – The first magnitude is defined as 100 times brighter than a sixth magnitude star. – There are then 5 equal divisions between these two. – Each magnitude is approximately 2.51 times fainter than the next higher magnitude number. – The absolu ...
... – The classification is based on apparent magnitude scale – The first magnitude is defined as 100 times brighter than a sixth magnitude star. – There are then 5 equal divisions between these two. – Each magnitude is approximately 2.51 times fainter than the next higher magnitude number. – The absolu ...
Lecture 4 - Orbits of the planets
... to stars? • We want to use the largest distance we can for the short side of the big triangle • What is the largest distance we can get between the two telescopes (if both of them have to be on Earth – no spacecraft). ...
... to stars? • We want to use the largest distance we can for the short side of the big triangle • What is the largest distance we can get between the two telescopes (if both of them have to be on Earth – no spacecraft). ...
Space Study Guide
... The Sun’s gravitational attraction, along with the planet’s inertia keeps the planets moving in elliptical orbits and determines how fast they orbit. Planets nearer the Sun move/orbit faster than planets farther from the Sun because the gravitational attraction is greater. When a planet is farther ...
... The Sun’s gravitational attraction, along with the planet’s inertia keeps the planets moving in elliptical orbits and determines how fast they orbit. Planets nearer the Sun move/orbit faster than planets farther from the Sun because the gravitational attraction is greater. When a planet is farther ...
The Seven African Powers of Creation
... motion. As soon as the first sun is created by the minds of the creators, it slowly condenses and solidifies, but is without light. After it has condensed through the four stages of magnetism, electricity, ether, and light, then it shines light on the first earth for the first time. This causes the ...
... motion. As soon as the first sun is created by the minds of the creators, it slowly condenses and solidifies, but is without light. After it has condensed through the four stages of magnetism, electricity, ether, and light, then it shines light on the first earth for the first time. This causes the ...
Document
... The background consists of photons (radiation) arriving at Earth directly from the end of the era of nuclei (when the Universe was about 380,000 years old). Neutral atoms captured most of the electrons. Photons were released and have flown freely through the universe ever since. This background radi ...
... The background consists of photons (radiation) arriving at Earth directly from the end of the era of nuclei (when the Universe was about 380,000 years old). Neutral atoms captured most of the electrons. Photons were released and have flown freely through the universe ever since. This background radi ...
HW attached
... wouldn’t be any orbits; instead, all planetary bodies would simply float around, running into each other when they crossed paths and just wandering forever. ...
... wouldn’t be any orbits; instead, all planetary bodies would simply float around, running into each other when they crossed paths and just wandering forever. ...
Skinners` School Physics
... total mark for this paper is 60. • The marks for each question are shown in brackets • The – use this as a guide as to how much time to spend on each question. ...
... total mark for this paper is 60. • The marks for each question are shown in brackets • The – use this as a guide as to how much time to spend on each question. ...
Cosmo: Student`s Workbook
... western world goes by a number of names. Eg The Aristotelian, the Classical, the geocentric, the Ptolmaic and the Medieval. It was a perfectly sensible model in that it satisfied the senses. The Earth was regarded as stationary and nailed in at the centre of the Universe. All heavenly bodies were th ...
... western world goes by a number of names. Eg The Aristotelian, the Classical, the geocentric, the Ptolmaic and the Medieval. It was a perfectly sensible model in that it satisfied the senses. The Earth was regarded as stationary and nailed in at the centre of the Universe. All heavenly bodies were th ...
PowerPoint Presentation - The Origin of the Universe
... • Why did they suggest this model? – If the early universe was hot (full of energy), a lot of features of the current universe could be explained… – Could explain where the matter that we see around us came from (H, He, Li created by the big bang) – Could explain the observed ratio of elements (nucl ...
... • Why did they suggest this model? – If the early universe was hot (full of energy), a lot of features of the current universe could be explained… – Could explain where the matter that we see around us came from (H, He, Li created by the big bang) – Could explain the observed ratio of elements (nucl ...
Practice Midterm 1
... 7. Which of the following is largest? A) size of a typical galaxy B) size of Pluto’s orbit C) distance to the nearest star (other than our Sun) D) 1 light-year 8. What does the equivalence principle of General Theory of Relativity say? A) Gravity is the same thing as curvature of spacetime. B) The ...
... 7. Which of the following is largest? A) size of a typical galaxy B) size of Pluto’s orbit C) distance to the nearest star (other than our Sun) D) 1 light-year 8. What does the equivalence principle of General Theory of Relativity say? A) Gravity is the same thing as curvature of spacetime. B) The ...
Note - Overflow Education
... Tycho Brahe studied and plotted the night sky with meticulous care and accuracy. This was an extraordinary achievement because he had no telescope to help him. Instead he designed and constructed his own astronomical measuring instruments. He was able to make measurements as accurate as 0.5 arc minu ...
... Tycho Brahe studied and plotted the night sky with meticulous care and accuracy. This was an extraordinary achievement because he had no telescope to help him. Instead he designed and constructed his own astronomical measuring instruments. He was able to make measurements as accurate as 0.5 arc minu ...
Cosmology
... corresponding to a temperature of 2.7 K at the present day, is the greatly redshifted remnant of the hot universe as it existed about 380,000 years after the Big Bang • During the first 380,000 years of the universe, radiation and matter formed an opaque plasma called the primordial fireball • The m ...
... corresponding to a temperature of 2.7 K at the present day, is the greatly redshifted remnant of the hot universe as it existed about 380,000 years after the Big Bang • During the first 380,000 years of the universe, radiation and matter formed an opaque plasma called the primordial fireball • The m ...
Outer space
Outer space, or just space, is the void that exists between celestial bodies, including the Earth. It is not completely empty, but consists of a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium as well as electromagnetic radiation, magnetic fields, neutrinos, dust and cosmic rays. The baseline temperature, as set by the background radiation from the Big Bang, is 2.7 kelvin (K). Plasma with a number density of less than one hydrogen atom per cubic metre and a temperature of millions of kelvin in the space between galaxies accounts for most of the baryonic (ordinary) matter in outer space; local concentrations have condensed into stars and galaxies. In most galaxies, observations provide evidence that 90% of the mass is in an unknown form, called dark matter, which interacts with other matter through gravitational but not electromagnetic forces. Data indicates that the majority of the mass-energy in the observable Universe is a poorly understood vacuum energy of space which astronomers label dark energy. Intergalactic space takes up most of the volume of the Universe, but even galaxies and star systems consist almost entirely of empty space.There is no firm boundary where space begins. However the Kármán line, at an altitude of 100 km (62 mi) above sea level, is conventionally used as the start of outer space in space treaties and for aerospace records keeping. The framework for international space law was established by the Outer Space Treaty, which was passed by the United Nations in 1967. This treaty precludes any claims of national sovereignty and permits all states to freely explore outer space. Despite the drafting of UN resolutions for the peaceful uses of outer space, anti-satellite weapons have been tested in Earth orbit.Humans began the physical exploration of space during the 20th century with the advent of high-altitude balloon flights, followed by manned rocket launches. Earth orbit was first achieved by Yuri Gagarin of the Soviet Union in 1961 and unmanned spacecraft have since reached all of the known planets in the Solar System. Due to the high cost of getting into space, manned spaceflight has been limited to low Earth orbit and the Moon.Outer space represents a challenging environment for human exploration because of the dual hazards of vacuum and radiation. Microgravity also has a negative effect on human physiology that causes both muscle atrophy and bone loss. In addition to these health and environmental issues, the economic cost of putting objects, including humans, into space is high.