April 2014 - Bluewater Astronomical Society
... for its content. Your original arHcles, images, opinions, comments, observing reports, etc., are welcome. I reserve the right to edit for brevity or clarity. Errors or omissions ...
... for its content. Your original arHcles, images, opinions, comments, observing reports, etc., are welcome. I reserve the right to edit for brevity or clarity. Errors or omissions ...
SECTION28.1 Formation of the Solar System
... • Within the rotating disk surrounding the young Sun, the temperature varied greatly with location. This resulted in different elements and compounds condensing, depending on their distance from the Sun, and affected the distribution of elements in the forming planets. ...
... • Within the rotating disk surrounding the young Sun, the temperature varied greatly with location. This resulted in different elements and compounds condensing, depending on their distance from the Sun, and affected the distribution of elements in the forming planets. ...
Comets
... in the belief that comet Hale-Bopp was a divine sign. Finally, we spend a great deal of time and effort worrying about impacts with comets, even though we are not paying attention to the fact that we are doing more environmental damage on our own than a comet impact would….. ...
... in the belief that comet Hale-Bopp was a divine sign. Finally, we spend a great deal of time and effort worrying about impacts with comets, even though we are not paying attention to the fact that we are doing more environmental damage on our own than a comet impact would….. ...
Live from McDonald Observatory: Observing Venus: explore how it
... 2012 happens to be a monumental year for observing Venus. Venus’s orbit is inclined 3.4% relative to Earth’s orbit. Therefore, when Venus passes directly in front of Earth (inferior conjunction), or, ...
... 2012 happens to be a monumental year for observing Venus. Venus’s orbit is inclined 3.4% relative to Earth’s orbit. Therefore, when Venus passes directly in front of Earth (inferior conjunction), or, ...
chapter 24 instructor notes
... In 1837 Argelander, of the Bonn Observatory and orginator of the BD catalogue, was able to derive an apex for the solar motion from studying stellar proper motions. His result is very similar to that recognized today. Also in 1837, Frederick Struve found evidence for interstellar extinction in star ...
... In 1837 Argelander, of the Bonn Observatory and orginator of the BD catalogue, was able to derive an apex for the solar motion from studying stellar proper motions. His result is very similar to that recognized today. Also in 1837, Frederick Struve found evidence for interstellar extinction in star ...
Unit 3: Laws of Motion and Energy
... work, her pocketbook has fallen on the floor in front of the passenger seat. One day, she asks you to explain why this happens in terms of physical science. What do you say? ...
... work, her pocketbook has fallen on the floor in front of the passenger seat. One day, she asks you to explain why this happens in terms of physical science. What do you say? ...
SUN, MOON, AND PLANETS Overview
... The Moon is a trickier companion. It is visible sometimes at night and sometimes during the day. In fact, the Moon splits each month evenly between day and night. The Moon’s shape also appears to change with the Moon’s time of arrival and departure in the sky. The changes in shape are known as phase ...
... The Moon is a trickier companion. It is visible sometimes at night and sometimes during the day. In fact, the Moon splits each month evenly between day and night. The Moon’s shape also appears to change with the Moon’s time of arrival and departure in the sky. The changes in shape are known as phase ...
CELESTIAL COORDINATES
... Every observer on Earth has his own separate alt-azimuth system; thus, the coordinates of the same object will differ for two different observers. Furthermore, because the Earth rotates, the altitude and azimuth of an object are constantly changing with time as seen from a given location. Hence, thi ...
... Every observer on Earth has his own separate alt-azimuth system; thus, the coordinates of the same object will differ for two different observers. Furthermore, because the Earth rotates, the altitude and azimuth of an object are constantly changing with time as seen from a given location. Hence, thi ...
The loss of nitrogen-rich atmospheres from Earth-like
... gaseous envelope even if the planet orbits its parent M star within the habitable zone (HZ). However, as shown in Lammer et al. (2007), a high CO2 atmospheric mixing ratio will result in enhanced IR cooling in the thermosphere and inhibits its expansion and therefore leads to reduced non-thermal atm ...
... gaseous envelope even if the planet orbits its parent M star within the habitable zone (HZ). However, as shown in Lammer et al. (2007), a high CO2 atmospheric mixing ratio will result in enhanced IR cooling in the thermosphere and inhibits its expansion and therefore leads to reduced non-thermal atm ...
Chapter2.1
... parallax could mean one of two things: 1. Stars are so far away that stellar parallax is too small to notice with the naked eye. 2. Earth does not orbit the Sun; it is the center of the universe. With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they d ...
... parallax could mean one of two things: 1. Stars are so far away that stellar parallax is too small to notice with the naked eye. 2. Earth does not orbit the Sun; it is the center of the universe. With rare exceptions such as Aristarchus, the Greeks rejected the correct explanation (1) because they d ...
lecture03_2013_sky_phases_eclipses
... • What is the cause of the seasons on Earth? • As the Earth orbits the sun, the tilt of the axis causes different portions of the Earth to receive more or less direct sunlight at different times of year. The two hemispheres have opposite seasons. The summer solstice is the time when the northern hem ...
... • What is the cause of the seasons on Earth? • As the Earth orbits the sun, the tilt of the axis causes different portions of the Earth to receive more or less direct sunlight at different times of year. The two hemispheres have opposite seasons. The summer solstice is the time when the northern hem ...
Estimating Eccentricity of Planetary and Stellar Cores
... a concentric core provoked scientists to develop a belief that the core is composed from some ferromagnetic alloy. However, this belief cannot explain magnetic pole shifts followed by long periods of a fairly stable magnetic field. An electrically charged eccentric core seems to offer a simple and e ...
... a concentric core provoked scientists to develop a belief that the core is composed from some ferromagnetic alloy. However, this belief cannot explain magnetic pole shifts followed by long periods of a fairly stable magnetic field. An electrically charged eccentric core seems to offer a simple and e ...
time dilation and length contraction, twin paradox, a pair of inertial
... platform, unless we let c' = c 2 + u 2 . This means that in order to preserve the relationship between space and time derived from the time dilation formula, r 2 − x 2 = h 2 (5), we must let c' = c 2 + u 2 . This is in direct contradiction with one of Einstein’s postulates for Special Relativity, wh ...
... platform, unless we let c' = c 2 + u 2 . This means that in order to preserve the relationship between space and time derived from the time dilation formula, r 2 − x 2 = h 2 (5), we must let c' = c 2 + u 2 . This is in direct contradiction with one of Einstein’s postulates for Special Relativity, wh ...
Finding the Most Distant Quasars Using Bayesian Selection Methods
... been almost completely ionised, as the first generations of stars—and quasars—emitted sufficient ultraviolet radiation to separate electrons from protons. The rest-frame wavelength of the break is at 0.1216 µm, but the wavelength of all light is increased by the cosmological expansion; the Universe ...
... been almost completely ionised, as the first generations of stars—and quasars—emitted sufficient ultraviolet radiation to separate electrons from protons. The rest-frame wavelength of the break is at 0.1216 µm, but the wavelength of all light is increased by the cosmological expansion; the Universe ...
There are billions of galaxies, many containing
... highway we see an approaching motorcycle and want to judge the distance to it. One way is to note the apparent brightness of its headlight. The light seems dim when the motorcycle is far away and bright when it is closer. We might be fooled if the motorcycle has an especially bright or dim headlight ...
... highway we see an approaching motorcycle and want to judge the distance to it. One way is to note the apparent brightness of its headlight. The light seems dim when the motorcycle is far away and bright when it is closer. We might be fooled if the motorcycle has an especially bright or dim headlight ...
Basic Solar Positional Astronomy
... which takes the place of the real Sun and tells such time. One cannot see an imaginary sun. But, since the Stars do appear to move uniformly around the Equator, they are used to measure Sidereal Time. This, in turn, with a suitable conversion, is used to determine accurate Mean Time. The discrepancy ...
... which takes the place of the real Sun and tells such time. One cannot see an imaginary sun. But, since the Stars do appear to move uniformly around the Equator, they are used to measure Sidereal Time. This, in turn, with a suitable conversion, is used to determine accurate Mean Time. The discrepancy ...
The formation of the solar system
... and the consequences for planet formation scenarios are discussed. Section 5 provides a closer look at the different stages of planet formation. Starting from dust grains, then considering pebble-sized objects to planetismals the current state of research is presented. This is followed by the final ...
... and the consequences for planet formation scenarios are discussed. Section 5 provides a closer look at the different stages of planet formation. Starting from dust grains, then considering pebble-sized objects to planetismals the current state of research is presented. This is followed by the final ...
The Solar System - MrCrabtreesScience
... • The largest of the planets (88,700km wide) • Is comprised almost entirely of hydrogen and helium. If it were considerably larger, it could have become a star. • The gas is compressed to a liquid in the center. • There is likely a molten rocky core, possibly from impacts with other objects. • Surfa ...
... • The largest of the planets (88,700km wide) • Is comprised almost entirely of hydrogen and helium. If it were considerably larger, it could have become a star. • The gas is compressed to a liquid in the center. • There is likely a molten rocky core, possibly from impacts with other objects. • Surfa ...
Calculations of tithis
... to 10,000 AD. We then test this formulation against the predicted tithis (full Moon) of lunar eclipses and show that the formulation gives accurate tithis from at least 2,000 BC to 3,000 AD. 1. Introduction The ancient Indian calendar dates back several thousand years and the relevant literature has ...
... to 10,000 AD. We then test this formulation against the predicted tithis (full Moon) of lunar eclipses and show that the formulation gives accurate tithis from at least 2,000 BC to 3,000 AD. 1. Introduction The ancient Indian calendar dates back several thousand years and the relevant literature has ...
photosphere
... Which transitions were responsible for each of these absorption lines? a) A: 1-2 B: 2-4 C: 1-4 b) A: 1-4 B: 2-4 C: 1-2 c) A: 4-1 B: 4-2 C: 2-1 ...
... Which transitions were responsible for each of these absorption lines? a) A: 1-2 B: 2-4 C: 1-4 b) A: 1-4 B: 2-4 C: 1-2 c) A: 4-1 B: 4-2 C: 2-1 ...
Planetary Fact Sheet – Metric
... (66.5- 23.5) = 42 from the zenith and would be up all day. The “all day” part follows form knowing that the NCP will be 66.5 above the northern horizon at this location and all objects between the NCP and (90- 66.5) = 24.5 in declination will be circumpolar. On the equinoxes, when the Sun has ...
... (66.5- 23.5) = 42 from the zenith and would be up all day. The “all day” part follows form knowing that the NCP will be 66.5 above the northern horizon at this location and all objects between the NCP and (90- 66.5) = 24.5 in declination will be circumpolar. On the equinoxes, when the Sun has ...
Does Light Travel with the Velocity of a Moving Source?
... from background position A can travel down the ever so slightly tilted telescope to reach the observers eye. He will see neither. In this case, the telescope would have to be aligned perfectly with the perpendicular for the observer (dashed telescope) to see the star against background position A as ...
... from background position A can travel down the ever so slightly tilted telescope to reach the observers eye. He will see neither. In this case, the telescope would have to be aligned perfectly with the perpendicular for the observer (dashed telescope) to see the star against background position A as ...
IDENTIFYING THE ROTATION RATE AND THE PRESENCE OF
... Such assumptions are clearly optimistic but not completely unreasonable. A 8 ; 3.5 m TPF-C mission could make such a highprecision measurement for an Earth-like planet (i.e., 25 mag fainter than the host star) with a 24 hr rotation period in the Centauri system (based on a 400 nm bandpass centered ...
... Such assumptions are clearly optimistic but not completely unreasonable. A 8 ; 3.5 m TPF-C mission could make such a highprecision measurement for an Earth-like planet (i.e., 25 mag fainter than the host star) with a 24 hr rotation period in the Centauri system (based on a 400 nm bandpass centered ...