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Universal Gravitation Chap 13 Hewitt
Universal Gravitation Chap 13 Hewitt

... • Any mass in the vicinity of Earth will be accelerated in the direction of the field lines at that location. • Earth’s gravitational field follows the inverse-square law. • Earth’s gravitational field is strongest near Earth’s surface and weaker at greater distances from Earth. ...
13 Universal Gravitation
13 Universal Gravitation

... • Any mass in the vicinity of Earth will be accelerated in the direction of the field lines at that location. • Earth’s gravitational field follows the inverse-square law. • Earth’s gravitational field is strongest near Earth’s surface and weaker at greater distances from Earth. ...
Article PDF - IOPscience
Article PDF - IOPscience

allowed planetary orbits
allowed planetary orbits

Part IV: Stars
Part IV: Stars

... interior, photons can only travel a fraction of a millimeter before “colliding” with an electron and deflecting into a new direction. So photons bounce around at random and only slowly make their way out of the Sun. Mathematical models use the observed composition and mass of the Sun, along with the ...
Chapter 1 LONG-TERM VARIATIONS IN THE GALACTIC
Chapter 1 LONG-TERM VARIATIONS IN THE GALACTIC

... Figure 1.3. The history of the SFR. The squares with error bars are the SFR calculated using chromospheric ages of nearby stars (Rocha-Pinto et al., 2000). These data are corrected for different selection biases and are binned into 0.4 Gyr bins. The line and hatched region describe a 1-2-1 average o ...
Deneb - Emmi
Deneb - Emmi

... Deneb, which means tail in Arabic, is the 19th brightest star in the universe, and one of the most well known stars in our very own Milky Way. ...
Genesis One and the Origin of the Earth
Genesis One and the Origin of the Earth

Here - Astrophysics Research Institute
Here - Astrophysics Research Institute

... Coordinates of Solar System Objects All the objects considered so far have been "fixed stars", which keep almost constant values of Right Ascension and Declination. But bodies within the Solar System move a lot within the equatorial coordinate system. The most important one to consider is the Sun. ...
the strange case of claudius ptolemy
the strange case of claudius ptolemy

... and moon in a famous work 4 that is still extant. He concluded that the diameter of the moon is about a third the diameter of the earth and that the diameter of the sun is about seven times that of the earth. The first value is reasonably accurate, but the second is far too small. Even so, Aristarch ...
Note on Brooks` new comet c 1911
Note on Brooks` new comet c 1911

... The paths of the Earth and the Com.et approMhed each other until about Oct. 1, after which the Comet's rapid movement carned it quiokly away, but during the month of October it approached the Sun and consequently got brighter and brighter all the time, l'llaking it quite visible to the naked eye. Ju ...
THE EVOLUTION OF SOLAR FLUX FROM 0.1 nm TO 160μm
THE EVOLUTION OF SOLAR FLUX FROM 0.1 nm TO 160μm

... where the scaling parameters α are given in Table 1, but cancel out here, due to the normalization to the modern Sun. It is important to note that Equation (2) is only one part of a competing set of physical process (including strong lines, photospheric models, and a “chromospheric excess”) that wil ...
File - EDUcity(class 7)
File - EDUcity(class 7)

... 1. The rice dish ‘paella’ comes from what country? 2. Deer meat is known by what name? 3. Are humans omnivore, herbivore or carnivore? 4. What food is used as the base of guacamole? 5. The range of vegetables, fruits, meats, nuts, grains, herbs and spices used in cooking are known as what? 6. True o ...
Solar System Moon Phases /Galactic Address
Solar System Moon Phases /Galactic Address

... Read aloud the first two verses on pages 2–3 of Faces of the Moon. This introduces the concept of moon cycle. "Do you wonder, when you see the Moon..." Explain that the word "month" comes from “Moon.” Long ago, a month represented the time it took to complete one cycle of the changing Moon phases (a ...
Unravelling the Origin and Evolution of Our Galaxy
Unravelling the Origin and Evolution of Our Galaxy

... than our Sun. These are all within a distance of about 100 light-years. The planets detectable by this method are rather massive, comparable to Jupiter (which has about 300 times the mass of Earth). The systems have some surprising properties: two thirds of these giant planets are orbiting their hos ...
comet panstarrs
comet panstarrs

... night sky. The brightening trend continues to speed up so that by mid-February, Comet PANSTARRS should be an unaided eye “fuzzy” located in the vicinity of the southern constellation of Microscopium. As it dives toward the Sun, it will move into the constellation of Pisces, easily visible in the S ...
asteroid wise - Lawrence Hall of Science
asteroid wise - Lawrence Hall of Science

... Coordinates For Earth and Sky To roughly locate things in the sky, we can identify groups of stars, called constellations. But to specify exactly where an object is in the sky, we use celestial coordinates. Celestial coordinates are to the sky, as geographical coordinates (latitude and longitude) ar ...
chapter 15 navigational astronomy
chapter 15 navigational astronomy

... nearly a fifth of a mile, and Pluto would be a ball half an inch in diameter at a distance of about seven miles. The nearest star would be one-fifth of the actual distance to the Moon. Because of the size of celestial distances, it is inconvenient to measure them in common units such as the mile or ...
doc 2.6M
doc 2.6M

... i) Explain how the sextant works. Show how to use it and demonstrate measuring horizontal angles and altitudes. ii) Find latitude by the altitude of Polaris or by the sun’s altitude at local apparent noon. Demonstrate how longitude is determined. iii) Demonstrate finding error in the boat’s compass ...
Activity Indices Based on Sun-as-a-Star Spectra Obtained with the
Activity Indices Based on Sun-as-a-Star Spectra Obtained with the

... What the stars on the main sequence also have in common is that they generate their energy from hydrogen burning in the core. Another very interesting finding was that stars spin up before they reach the main sequence (Bouvier et al., 1986), and once on the main sequence their surface angular veloci ...
Chronology of Physics
Chronology of Physics

doc 2.6M
doc 2.6M

... i) Explain how the sextant works. Show how to use it and demonstrate measuring horizontal angles and altitudes. ii) Find latitude by the altitude of Polaris or by the sun’s altitude at local apparent noon. Demonstrate how longitude is determined. iii) Demonstrate finding error in the boat’s compass ...
No Slide Title - Laboratory for Atmospheric and Space Physics
No Slide Title - Laboratory for Atmospheric and Space Physics

... The solar chromosphere • After T drops to ~4000 K, it rises again to ~20,000 K over 0.002 Rsun of height. • Observations of this region show shocks, thin “spicules,” and an apparently larger-scale set of convective cells (“super-granulation”). ...
The first focused hard X-ray images of the sun with
The first focused hard X-ray images of the sun with

... Here we present the first focused HXR images of the Sun from the Nuclear Spectroscopic Telescope ARray (NuSTAR, Harrison et al. 2013) which observes the sky from 3 to 79 keV with focusing optics whose point-spread function (PSF) has a half-power diameter (HPD) of ∼60″. NuSTAR’s primary science goals ...
10. Atmospheres of Planets and of Exoplanets - ETH E
10. Atmospheres of Planets and of Exoplanets - ETH E

... Earth’s Atmosphere and as a consequence, its pressure is about 93 bar at the middle floor level. This corresponds to a pressure at a depth of 910 m sea level on Earth. At the surface, the density is about 50 times larger than at the Earth. Viewed from outside, the Atmosphere of Venus is compleately ...
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Astronomical unit

The astronomical unit (symbol au, AU or ua) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, it is now defined as exactly 7011149597870700000♠149597870700 meters (about 150 million kilometers, or 93 million miles). The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System or around other stars. However, it is also a fundamental component in the definition of another unit of astronomical length, the parsec.
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