Exercise 5
... By the 1920’s, various astronomers had evidence that the temperature of a star was also related to the star’s luminosity (the intrinsic “brightness” of a star). So, to quantify the luminosity without using non-standard brightness units, astronomers developed the absolute magnitude scale, which is th ...
... By the 1920’s, various astronomers had evidence that the temperature of a star was also related to the star’s luminosity (the intrinsic “brightness” of a star). So, to quantify the luminosity without using non-standard brightness units, astronomers developed the absolute magnitude scale, which is th ...
Chapter 2 PowerPoint
... • Changing orientation of the celestial equator – Precession of the equinoxes – ~ 26,000 years for one complete first-day-of-season cycle ...
... • Changing orientation of the celestial equator – Precession of the equinoxes – ~ 26,000 years for one complete first-day-of-season cycle ...
Celestial Motions - Georgia State University
... – We can see over 2,000 stars and the Milky Way with our naked eyes, and each position on the sky belongs to one of 88 constellations – We can specify the position of an object in the local sky by its altitude above the horizon and its direction along the horizon • Why do stars rise and set? – Becau ...
... – We can see over 2,000 stars and the Milky Way with our naked eyes, and each position on the sky belongs to one of 88 constellations – We can specify the position of an object in the local sky by its altitude above the horizon and its direction along the horizon • Why do stars rise and set? – Becau ...
03jan13.ppt - Institute for Astronomy
... Why doesn’t orbital distance from the Sun matter? • Small variation for Earth — about 3% (but orbit distance does matter for some other planets, notably Mars and Pluto). • Surprisingly, seasons are more extreme in N. hemisphere, even though Earth is closer to Sun in S. hemisphere summer (and farthe ...
... Why doesn’t orbital distance from the Sun matter? • Small variation for Earth — about 3% (but orbit distance does matter for some other planets, notably Mars and Pluto). • Surprisingly, seasons are more extreme in N. hemisphere, even though Earth is closer to Sun in S. hemisphere summer (and farthe ...
Fulltext PDF
... The spectral index α is calculated in the wavelength interval of 2.2–20 μm. Class 0 stars were objects which showed strong emission at submillimeter wavelengths, but are very faint at λ < 10μm. Later, the class of ‘flat spectrum’ sources were added. This classification schema follows an evolutionary ...
... The spectral index α is calculated in the wavelength interval of 2.2–20 μm. Class 0 stars were objects which showed strong emission at submillimeter wavelengths, but are very faint at λ < 10μm. Later, the class of ‘flat spectrum’ sources were added. This classification schema follows an evolutionary ...
norfolk skies - Norfolk Astronomical Society
... just south of Sirius, in the constellation pf Canis Major. It's a very impressive little group, with about 3040 little 10th magnitude stars, all bunched up around this bright 4th magnitude star. A very attractive cluster, even in a small telescope, and it's magnificent in a larger one. It's known as ...
... just south of Sirius, in the constellation pf Canis Major. It's a very impressive little group, with about 3040 little 10th magnitude stars, all bunched up around this bright 4th magnitude star. A very attractive cluster, even in a small telescope, and it's magnificent in a larger one. It's known as ...
Table of Contents - Shawnee State University
... The Orion Educator’s Guide is designed for Planetarians, Teachers, and parents. The information is researched, organized, and laid out so that the educator need not spend hours coming up with lesson plans or labs. This has already been accomplished by certified educators. The guide is written to all ...
... The Orion Educator’s Guide is designed for Planetarians, Teachers, and parents. The information is researched, organized, and laid out so that the educator need not spend hours coming up with lesson plans or labs. This has already been accomplished by certified educators. The guide is written to all ...
December - Rose City Astronomers
... scanty star grouping of DolidzeDžimšelejšvili 1 (Do-Dž 1). This triple star and open cluster combo is a remarkable stroke of cosmic serendipity in an area nearly devoid of other major deep-sky objects. The refractor at 44x shows the 12' diameter star cluster as six stars (9th to 11thmagnitude) embed ...
... scanty star grouping of DolidzeDžimšelejšvili 1 (Do-Dž 1). This triple star and open cluster combo is a remarkable stroke of cosmic serendipity in an area nearly devoid of other major deep-sky objects. The refractor at 44x shows the 12' diameter star cluster as six stars (9th to 11thmagnitude) embed ...
AN ATTEMPT To prove the MOTION OF THE EARTH FROM
... with their Instruments and wayes of using them, we shall find that their performances thereby ...
... with their Instruments and wayes of using them, we shall find that their performances thereby ...
Doppler Shift - El Camino College
... When we study an astronomical object like a star or galaxy, we usually examine the spectrum of light it gives off. Recall that the spectrum of an object contains lines that work like fingerprints to help identify different elements. Since the lines of a spectrum occur at specific wavelengths we can ...
... When we study an astronomical object like a star or galaxy, we usually examine the spectrum of light it gives off. Recall that the spectrum of an object contains lines that work like fingerprints to help identify different elements. Since the lines of a spectrum occur at specific wavelengths we can ...
Number of planets - Associazione Astrofili "Crab Nebula"
... - however slight caused by a planet (both bodies orbit around the center of mass). For comparison, Jupiter – when seen from a distance of 10 light years – makes our Sun oscillate of about 1 millionth of grade, with a period of about 12 years. ...
... - however slight caused by a planet (both bodies orbit around the center of mass). For comparison, Jupiter – when seen from a distance of 10 light years – makes our Sun oscillate of about 1 millionth of grade, with a period of about 12 years. ...
newsletter - Thanet Astronomy Group
... Ceres. At the time of writing Dawn is on schedule to reach orbit of Ceres on 6 March 2015. Ceres is a dwarf planet only 950 kilometres (590 miles) in diameter. What Exactly is a Dwarf Planet ? The exact definition of what a dwarf planet is, is defined by the International Astronomical Union (IAU), f ...
... Ceres. At the time of writing Dawn is on schedule to reach orbit of Ceres on 6 March 2015. Ceres is a dwarf planet only 950 kilometres (590 miles) in diameter. What Exactly is a Dwarf Planet ? The exact definition of what a dwarf planet is, is defined by the International Astronomical Union (IAU), f ...
Geoscience Final Review material
... d. Temperature of the stars 137. Which is longer, a day according to the Sun (solar day), or a day according to the background stars (sidereal day)? a. The longest day is a sidereal day c. The longest day is a solar day b. The days are the same length (duh) d. The shortest day is any day there is a ...
... d. Temperature of the stars 137. Which is longer, a day according to the Sun (solar day), or a day according to the background stars (sidereal day)? a. The longest day is a sidereal day c. The longest day is a solar day b. The days are the same length (duh) d. The shortest day is any day there is a ...
INSIDE LAB 7: Measuring the Velocities of Stars
... can affect the wavelength. A star moving towards or away from has, due to the Doppler shift, all of its waves shifted to shorter or longer wavelengths, as illustrated in Fig. 4. Moving Figure 4: The Doppler shift. An object moving objects generate waves of any towards you has its light shifted towar ...
... can affect the wavelength. A star moving towards or away from has, due to the Doppler shift, all of its waves shifted to shorter or longer wavelengths, as illustrated in Fig. 4. Moving Figure 4: The Doppler shift. An object moving objects generate waves of any towards you has its light shifted towar ...
Game Guide / Chronopticon
... • There are 12 zodiac constellations, representing mythological people, animals, and objects • Like the sun, any given star or constellation seems to move in an arc across the sky over the course of hours • Different constellations are visible during different times of year (or different seasons) • ...
... • There are 12 zodiac constellations, representing mythological people, animals, and objects • Like the sun, any given star or constellation seems to move in an arc across the sky over the course of hours • Different constellations are visible during different times of year (or different seasons) • ...
21structure1i
... There is no single method that can be used to find the distances to all objects We use many methods, each building on the other Called the cosmic distance ladder ...
... There is no single method that can be used to find the distances to all objects We use many methods, each building on the other Called the cosmic distance ladder ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.