1. Our galaxy, the Milky Way, is one of about 100 billion galaxies in the universe. It is estimated that there are 100 billion galaxies in the universe.
2. Light from distant galaxies is redshifted, meaning it is shifted toward the red end of the electromagnetic spectrum. This is evidence that the universe is expanding.
3. According to the Big Bang theory, the universe began as a single point about 13.7 billion years ago and has been expanding ever since. Radiation left over from the Big Bang, called the cosmic microwave background radiation, has been detected and provides support for the Big Bang theory.
This PowerPoint discusses the Sun at a high school level. It talks about characteristics, solar activities/events, how energy is created, and many more.
Other Solar Systems and Life in the UniverseArjel Diongson
The presentation features the history of exoplanets, its proponents/discoverers and its recent studies and developments. Videos may not be available for PCs which does not support video clip formats..
Astronomy - Stat eof the Art - CosmologyChris Impey
Astronomy - State of the Art is a course covering the hottest topics in astronomy. In this section, the properties of the whole universe are covered, including Hubble expansion, the age and size, the big bang, and dark energy.
This PowerPoint discusses the Sun at a high school level. It talks about characteristics, solar activities/events, how energy is created, and many more.
Other Solar Systems and Life in the UniverseArjel Diongson
The presentation features the history of exoplanets, its proponents/discoverers and its recent studies and developments. Videos may not be available for PCs which does not support video clip formats..
Astronomy - Stat eof the Art - CosmologyChris Impey
Astronomy - State of the Art is a course covering the hottest topics in astronomy. In this section, the properties of the whole universe are covered, including Hubble expansion, the age and size, the big bang, and dark energy.
This slideshow explains how scientists measured the size of the universe and its age, It is a miracle that this can even possible to do. The slide show also explain the discovery of the Redshift and the expanding universe. The evolution, the history and the major structure of our universe. It is only within our lifetime, these sorts of question about our origin was asked.
The term planet is ancient, with ties to history, astrology, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities.
Astronomy - State of the Art - GalaxiesChris Impey
Astronomy - State of the Art is a course covering the hottest topics in astronomy. In this section, the properties of galaxies are discussed, including supermassive black holes and dark matter.
Maybe too in-depth for most elementary students, but very good broad coverage for teacher background or more advanced students in elementary or middle school.
Introduce wavelength and amplitude for longitudinal and transverse waves, Show that wavespeed depends on the medium and frequency depends on the source, Introduce the wave equation
This slideshow explains how scientists measured the size of the universe and its age, It is a miracle that this can even possible to do. The slide show also explain the discovery of the Redshift and the expanding universe. The evolution, the history and the major structure of our universe. It is only within our lifetime, these sorts of question about our origin was asked.
The term planet is ancient, with ties to history, astrology, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities.
Astronomy - State of the Art - GalaxiesChris Impey
Astronomy - State of the Art is a course covering the hottest topics in astronomy. In this section, the properties of galaxies are discussed, including supermassive black holes and dark matter.
Maybe too in-depth for most elementary students, but very good broad coverage for teacher background or more advanced students in elementary or middle school.
Introduce wavelength and amplitude for longitudinal and transverse waves, Show that wavespeed depends on the medium and frequency depends on the source, Introduce the wave equation
How do you get your legislature to pass a bill supporting plain language? This paper will explore the efforts of plain language supporters to get the United States Congress to pass a bill requiring federal agencies to write certain documents in plain language. I’ll report on where we are, how we got there, and what happens next.
Shorter version of complex forms at Clarity2010Clarity2010
Design tips for complex forms.
This is the shorter presentation for the main conference; there is a longer one available at http://slideshare.net/cjforms
This article seeks to present the future of the Universe, as well as to point out the measures that lead to the survival of humanity in the face of the numerous threats that may occur at the level of the solar system and the Universe as a whole.
Though i am not an applied physics /B.S.C physics student ,Science has always been something of my interest :) Presentation during "International School on Astronomy and Space Science organized by Ministry of Environment, Science and Technology and B.P. Koirala Memorial Planetorium, Observatory and Science Museum Development Board "
The Big Bang event is a physical theory that describes how the universe expanded from an initial state of high density and temperature.[1] Various cosmological models of the Big Bang explain the evolution of the observable universe from the earliest known periods through its subsequent large-scale form.[2][3][4] These models offer a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background (CMB) radiation, and large-scale structure. The overall uniformity of the Universe, known as the flatness problem, is explained through cosmic inflation: a sudden and very rapid expansion of space during the earliest moments. However, physics currently lacks a widely accepted theory of quantum gravity that can successfully model the earliest conditions of the Big Bang.
Crucially, these models are compatible with the Hubble–Lemaître law—the observation that the farther away a galaxy is, the faster it is moving away from Earth. Extrapolating this cosmic expansion backwards in time using the known laws of physics, the models describe an increasingly concentrated cosmos preceded by a singularity in which space and time lose meaning (typically named "the Big Bang singularity").[5] In 1964 the CMB was discovered, which convinced many cosmologists that the competing steady-state model of cosmic evolution was falsified,[6] since the Big Bang models predict a uniform background radiation caused by high temperatures and densities in the distant past. A wide range of empirical evidence strongly favors the Big Bang event, which is now essentially universally accepted.[7] Detailed measurements of the expansion rate of the universe place the Big Bang singularity at an estimated 13.787±0.020 billion years ago, which is considered the age of the universe.[8]
There remain aspects of the observed universe that are not yet adequately explained by the Big Bang models. After its initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later atoms. The unequal abundances of matter and antimatter that allowed this to occur is an unexplained effect known as baryon asymmetry. These primordial elements—mostly hydrogen, with some helium and lithium—later coalesced through gravity, forming early stars and galaxies. Astronomers observe the gravitational effects of an unknown dark matter surrounding galaxies. Most of the gravitational potential in the universe seems to be in this form, and the Big Bang models and various observations indicate that this excess gravitational potential is not created by baryonic matter, such as normal atoms. Measurements of the redshifts of supernovae indicate that the expansion of the universe is accelerating, an observation attributed to an unexplained phenomenon known as dark energy.
This article aims to present the origin and evolution of Universe, Sun and Earth as well as alternative solutions for the survival of humanity with the end of Earth planet, Sun and Universe.
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