Gothic Cathedrals and Solar Cells (and maybe a Grail?)
... • Placing small particles of a reflective medium at surface reduces ...
... • Placing small particles of a reflective medium at surface reduces ...
Finding planets and life among the stars
... an almost weekly basis. Since 1995, humanity has gone from zero examples of extrasolar worlds to more than five thousand— almost 500 of which reside in multi-planet systems. ...
... an almost weekly basis. Since 1995, humanity has gone from zero examples of extrasolar worlds to more than five thousand— almost 500 of which reside in multi-planet systems. ...
Rogava_Course_-_First_lecture
... • Detached binaries are a kind of binary stars where each component is within its Roche lobe. No major impact on each other, stars essentially evolve separately. • Semidetached binary stars: one of the components fills its Roche lobe and the other does not. Gas from the surface of the Roche lobe fil ...
... • Detached binaries are a kind of binary stars where each component is within its Roche lobe. No major impact on each other, stars essentially evolve separately. • Semidetached binary stars: one of the components fills its Roche lobe and the other does not. Gas from the surface of the Roche lobe fil ...
Name:
... this star you can find a larger, bowl-shaped figure with a handle called the Big 3)_________________. Once you find this pattern you can use the “Pointer Stars” at the top of the bowl to help you find the Pole Star anytime of year. Extend a line to the upper left from the Big Dipper and through the ...
... this star you can find a larger, bowl-shaped figure with a handle called the Big 3)_________________. Once you find this pattern you can use the “Pointer Stars” at the top of the bowl to help you find the Pole Star anytime of year. Extend a line to the upper left from the Big Dipper and through the ...
Phobos
... it from Ptolemy in his work called the ‘Algamest’ (C.151 BCE.) He in turn took it from the poetic work of Aratos called ‘The Phaenomena’ (275 BCE.) The information for his work was taken from the list of Eudoxus of Knidos (403 to 350 BC). Where it originated from is anyone’s guess, but it is certain ...
... it from Ptolemy in his work called the ‘Algamest’ (C.151 BCE.) He in turn took it from the poetic work of Aratos called ‘The Phaenomena’ (275 BCE.) The information for his work was taken from the list of Eudoxus of Knidos (403 to 350 BC). Where it originated from is anyone’s guess, but it is certain ...
Antlia, the Machine Pneumatique
... cleus. Walter Scott, the late American amateur, recorded it as a glow with little central condensation while Ernst Johannes Hartung notes it as having a well-defined, much brighter nucleus. Hartung produced a comprehensive and highly respected guide for southern observers in 1968. One of the few ope ...
... cleus. Walter Scott, the late American amateur, recorded it as a glow with little central condensation while Ernst Johannes Hartung notes it as having a well-defined, much brighter nucleus. Hartung produced a comprehensive and highly respected guide for southern observers in 1968. One of the few ope ...
STUDY GUIDE – UNIT 3: EARTH IN SPACE
... STUDY GUIDE – UNIT 3: EARTH IN SPACE DAILY APPARENT MOTION/DIAMETER objects appear to move E to W at 15/hr, due to Earth’s rotation, sunrise, sunset, star paths, circumpolar stars, object appears to get larger or smaller. larger = closer in orbit, smaller = farther in orbit ...
... STUDY GUIDE – UNIT 3: EARTH IN SPACE DAILY APPARENT MOTION/DIAMETER objects appear to move E to W at 15/hr, due to Earth’s rotation, sunrise, sunset, star paths, circumpolar stars, object appears to get larger or smaller. larger = closer in orbit, smaller = farther in orbit ...
White Dwarf Stars After nuclear burning ceases, a post
... • Many intermediate temperature white dwarf atmospheres do convect. Thus, simple radiative energy transport is not applicable to all white dwarfs. This changes the cooling curve somewhat, and can change the surface abundances. • It is an observed fact that the overwhelming majority of white dwarfs h ...
... • Many intermediate temperature white dwarf atmospheres do convect. Thus, simple radiative energy transport is not applicable to all white dwarfs. This changes the cooling curve somewhat, and can change the surface abundances. • It is an observed fact that the overwhelming majority of white dwarfs h ...
Explainer: Light-years and units for the stars
... There is a flash of lightning and some seconds later Magellanic Cloud, which can be seen on very dark we hear the roll of thunder. The speed of sound is nights, is 160,000 light-years away! roughly 340 metres every second, or 1,200 kilometres an hour. Light travels almost a million times faster than ...
... There is a flash of lightning and some seconds later Magellanic Cloud, which can be seen on very dark we hear the roll of thunder. The speed of sound is nights, is 160,000 light-years away! roughly 340 metres every second, or 1,200 kilometres an hour. Light travels almost a million times faster than ...
Our galaxy is the centre of the universe
... galaxies from us. Then it would be the distances themselves that fall into groups. That would mean the galaxies tend to be grouped into (conceptual) spherical shells concentric around our home galaxy, the Milky Way. The shells turn out to be on the order of a million light years apart. The groups of ...
... galaxies from us. Then it would be the distances themselves that fall into groups. That would mean the galaxies tend to be grouped into (conceptual) spherical shells concentric around our home galaxy, the Milky Way. The shells turn out to be on the order of a million light years apart. The groups of ...
Our galaxy is the centre of the universe, `quantized` red shifts show
... compensating for the Earth’s motion around the Sun and the Sun’s motion around our galaxy’s centre. That shows the quantizations more clearly. In section 7, I will extend the meaning of ‘galactocentric’ beyond reference frames. Napier and Guthrie’s results show quantization occurs at least out to me ...
... compensating for the Earth’s motion around the Sun and the Sun’s motion around our galaxy’s centre. That shows the quantizations more clearly. In section 7, I will extend the meaning of ‘galactocentric’ beyond reference frames. Napier and Guthrie’s results show quantization occurs at least out to me ...
Telescopes
... half a micron, the mirror must be ground and polished to the right shape +/- a few percent of a micron, so the mirror must be very rigid. Radio waves have wavelengths of millimeters to meters, so the radio dishes have to accurate to a tenth of a millimeter to 10 cm. Thus, they can be made of wire me ...
... half a micron, the mirror must be ground and polished to the right shape +/- a few percent of a micron, so the mirror must be very rigid. Radio waves have wavelengths of millimeters to meters, so the radio dishes have to accurate to a tenth of a millimeter to 10 cm. Thus, they can be made of wire me ...
Lecture 2
... There are two other fundamental properties of stars that we can measure – age (time t) and chemical composition (X, Y, Z). Composition parameterized with the notation: X = mass fraction of hydrogen H Y = mass fraction of helium He Z = mass fraction of all other elements e.g., for the Sun: X¤ = 0.747 ...
... There are two other fundamental properties of stars that we can measure – age (time t) and chemical composition (X, Y, Z). Composition parameterized with the notation: X = mass fraction of hydrogen H Y = mass fraction of helium He Z = mass fraction of all other elements e.g., for the Sun: X¤ = 0.747 ...
Document
... – The luminosity depends on the surface area of the star (R2) and T 4 (from Stefan’s law). – Hence, the ratio of the radii of Betelgeuse and the Sun is: – R / R = (T / T )2 (L / L)1/2 = 370 – This corresponds to almost 2 AU – I.e., larger than the orbit of Mars (1.5 AU)! ...
... – The luminosity depends on the surface area of the star (R2) and T 4 (from Stefan’s law). – Hence, the ratio of the radii of Betelgeuse and the Sun is: – R / R = (T / T )2 (L / L)1/2 = 370 – This corresponds to almost 2 AU – I.e., larger than the orbit of Mars (1.5 AU)! ...
Chapter 14 Our Star The Sun is the Largest Object in the Solar
... Are cooler (4000 K) than other parts of the Sun’s surface (6000 K) ...
... Are cooler (4000 K) than other parts of the Sun’s surface (6000 K) ...
From temporal spectra to stellar interiors (and back)
... Separated equations Separation of time as exp(- i t) ...
... Separated equations Separation of time as exp(- i t) ...
Where Did the Elements Come From?
... • As H is used up, the star shrinks and becomes hot • This causes He to fuse and form elements with higher atomic numbers • Fe and Ni are the largest formed by this (believed to be in Earth’s core) ...
... • As H is used up, the star shrinks and becomes hot • This causes He to fuse and form elements with higher atomic numbers • Fe and Ni are the largest formed by this (believed to be in Earth’s core) ...
3919 - newmanlib.ibri.org
... kkb, Akk. kakkabu, Aram. kôkb', Syr. kaukeb, Arab. kaukab. Etymologies have been proposed from kbb, burn (Akk., Aram. and Arab.) and from kabba, roll, revolve (Arab.). Unlike modern Eng. usage but parallel to ancient G, the Sem. word probably includes planets, comets, meteors, or any bright object ...
... kkb, Akk. kakkabu, Aram. kôkb', Syr. kaukeb, Arab. kaukab. Etymologies have been proposed from kbb, burn (Akk., Aram. and Arab.) and from kabba, roll, revolve (Arab.). Unlike modern Eng. usage but parallel to ancient G, the Sem. word probably includes planets, comets, meteors, or any bright object ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.