Logarithms and Earthquake Magnitude
... If the amplitude at 100 km is less than 4.8 x 10-7 then (A / Azero) will be less than one, which yields a magnitude less than zero because the log10 of a number less than one will be negative. In practice earthquakes this small, although quite numerous, are usually too small to be recorded and locat ...
... If the amplitude at 100 km is less than 4.8 x 10-7 then (A / Azero) will be less than one, which yields a magnitude less than zero because the log10 of a number less than one will be negative. In practice earthquakes this small, although quite numerous, are usually too small to be recorded and locat ...
what`s up this month – april 2017
... the middle ages the Virgin was often associated with the Virgin Mary. Spica is the brightest star in the constellation of Virgo and the 16 th brightest star in the night sky. Analysis of its parallax shows that it is located 250 light years from the Sun. It is a spectroscopic binary and rotating ell ...
... the middle ages the Virgin was often associated with the Virgin Mary. Spica is the brightest star in the constellation of Virgo and the 16 th brightest star in the night sky. Analysis of its parallax shows that it is located 250 light years from the Sun. It is a spectroscopic binary and rotating ell ...
Stars
... Twelve constellations, together called the Zodiac, form a belt around the earth. As the earth revolves around the sun, a different part of the sky becomes visible until, after a year, the earth has completed one trip and starts again. Each month, one of the 12 constellations appears above the horizo ...
... Twelve constellations, together called the Zodiac, form a belt around the earth. As the earth revolves around the sun, a different part of the sky becomes visible until, after a year, the earth has completed one trip and starts again. Each month, one of the 12 constellations appears above the horizo ...
Star in a Box
... The stars Vega and Sirius are brighter than the Sun, and also hotter. Where would you put them? Where would you mark the Sun on the plot? ...
... The stars Vega and Sirius are brighter than the Sun, and also hotter. Where would you put them? Where would you mark the Sun on the plot? ...
The Seasons (PowerPoint)
... ON ANY GIVEN DAY, the Sun is just like any other star, except that it is extraordinarily bright. It lights up the whole sky. During our Winter, it acts like a Southern star, and follows a relatively low daily ‘arc’ across the southern skies. During our Summer, it is a Northern star, and climbs much ...
... ON ANY GIVEN DAY, the Sun is just like any other star, except that it is extraordinarily bright. It lights up the whole sky. During our Winter, it acts like a Southern star, and follows a relatively low daily ‘arc’ across the southern skies. During our Summer, it is a Northern star, and climbs much ...
Unit I – The Seasons
... result is the same! We will see different constellations of the Zodiac at different times of year. ...
... result is the same! We will see different constellations of the Zodiac at different times of year. ...
Part 1: If a 10000 K blackbody has a wavelength of peak emission at
... Most students didn’t come close to providing this kind of answer even though it was the basis for the Homework 3 assignment of determining spectral types! A typical answer was something like this: “Astronomers measure the color and luminosity of a star to determine its spectral ...
... Most students didn’t come close to providing this kind of answer even though it was the basis for the Homework 3 assignment of determining spectral types! A typical answer was something like this: “Astronomers measure the color and luminosity of a star to determine its spectral ...
Motions of the Sky—2 Sep Hipparchus measures the moon’s distance~200BC
... 2. How do you explain day and night using the celestial sphere? 3. How do you explain seasonal changes in the sky? ...
... 2. How do you explain day and night using the celestial sphere? 3. How do you explain seasonal changes in the sky? ...
Movements of Objects in Space
... the Sun, all in the same direction, and all in roughly the same plane (i.e. it's like they are all laid out on a large dinner plate with the Sun at the center). The outer planets orbit more slowly than the inner planets. 4. The stars appear stationary. (They do, in fact, move very quickly. But they ...
... the Sun, all in the same direction, and all in roughly the same plane (i.e. it's like they are all laid out on a large dinner plate with the Sun at the center). The outer planets orbit more slowly than the inner planets. 4. The stars appear stationary. (They do, in fact, move very quickly. But they ...
Intelligent life in the Universe
... – Should support liquid water. – It cannot get so hot as to photo dissociate water (if the sun was 10% hotter or 3% closer, this would happen on Earth). This gives a proximity limit of 0.95 AU for a livable planet around our Sun – The outer edge is defined by CO2 condensation temperature which will ...
... – Should support liquid water. – It cannot get so hot as to photo dissociate water (if the sun was 10% hotter or 3% closer, this would happen on Earth). This gives a proximity limit of 0.95 AU for a livable planet around our Sun – The outer edge is defined by CO2 condensation temperature which will ...
The Milky Way - 清華大學物理系歡迎頁 Welcome to
... The variability period of a Cepheid variable is correlated with its luminosity. The more luminous it is, the more slowly it pulsates. => Measuring a Cepheid’s period, we can determine its absolute magnitude! ...
... The variability period of a Cepheid variable is correlated with its luminosity. The more luminous it is, the more slowly it pulsates. => Measuring a Cepheid’s period, we can determine its absolute magnitude! ...
Exoplanets - An ESO/OPTICON/IAU summer school on modern
... "A planet is a celestial body that: (a) is in orbit around the Sun (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit." IAU, Resolution B5 "Extrasolar pla ...
... "A planet is a celestial body that: (a) is in orbit around the Sun (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit." IAU, Resolution B5 "Extrasolar pla ...
Quiz Maker - Geneva 304
... 1. From looking at Figure 24-11 in your book, draw the Lyman series and the Balmer series on the same wavelength axis, that is, on a horizontal straight line labeled in angstroms every 500 Å from 500 to 7,000 Å. ...
... 1. From looking at Figure 24-11 in your book, draw the Lyman series and the Balmer series on the same wavelength axis, that is, on a horizontal straight line labeled in angstroms every 500 Å from 500 to 7,000 Å. ...
Sir Isaac Newton
... Convicted of heresy, Galileo was placed under house arrest for the remainder of his life, a gentle punishment for any individual convicted during the Inquisition. On 31 October 1992, 350 years after Galileo's death, Pope John Paul II gave an address on behalf of the Catholic Church in which he admit ...
... Convicted of heresy, Galileo was placed under house arrest for the remainder of his life, a gentle punishment for any individual convicted during the Inquisition. On 31 October 1992, 350 years after Galileo's death, Pope John Paul II gave an address on behalf of the Catholic Church in which he admit ...
Where do you find yourself now??
... The map shows several stars visible with the naked eye which are located deep within the Orion arm. The most notable group of stars here are main stars in the constellation of Orion -from which the spiral arm gets its name. All of these stars are bright giant and supergiant -stars, thousands of time ...
... The map shows several stars visible with the naked eye which are located deep within the Orion arm. The most notable group of stars here are main stars in the constellation of Orion -from which the spiral arm gets its name. All of these stars are bright giant and supergiant -stars, thousands of time ...
Astronomy
... Jupiter is like a mini solar system Milky Way is populated by uncountable number of stars Earth-centered universe is too simple Phases of Venus found to disagree with the geocentric model ...
... Jupiter is like a mini solar system Milky Way is populated by uncountable number of stars Earth-centered universe is too simple Phases of Venus found to disagree with the geocentric model ...
A105 Stars and Galaxies
... Planets with semi-major axes > 3AU have periods comparable to or longer than the length of most Doppler surveys, so the distribution is incomplete beyond that distance. ...
... Planets with semi-major axes > 3AU have periods comparable to or longer than the length of most Doppler surveys, so the distribution is incomplete beyond that distance. ...
Venus - Uplift Education
... Historically, Venus is well known as the morning star, or evening star. Named after the Roman goddess of love and beauty its surface is veiled by thick clouds. Beside the Sun and Moon, Venus is the brightest celestial object, shine with steady bright white light. Its physical dimensions are rather s ...
... Historically, Venus is well known as the morning star, or evening star. Named after the Roman goddess of love and beauty its surface is veiled by thick clouds. Beside the Sun and Moon, Venus is the brightest celestial object, shine with steady bright white light. Its physical dimensions are rather s ...
Chapter 20 Stellar Evolution (20.1-20.3)
... nebula, even though it has nothing to do with planets—early astronomers viewing the fuzzy envelope thought it resembled a planetary system. Planetary nebulae can have many shapes: As the dead core of the star cools, the nebula continues to expand and dissipates into the surroundings. ...
... nebula, even though it has nothing to do with planets—early astronomers viewing the fuzzy envelope thought it resembled a planetary system. Planetary nebulae can have many shapes: As the dead core of the star cools, the nebula continues to expand and dissipates into the surroundings. ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.