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... precise radial-velocity measurement. However, this requirement is not necessarily synonymous with optical efficiency. For example, spectral resolution is an important factor in reducing the photon noise of the radial-velocity measurement but is often in competition with the optical efficiency of the ...
... precise radial-velocity measurement. However, this requirement is not necessarily synonymous with optical efficiency. For example, spectral resolution is an important factor in reducing the photon noise of the radial-velocity measurement but is often in competition with the optical efficiency of the ...
AUST – HORIZON AND BEYOND part 1
... Summer solstice (22 Dec) On the day of Summer Solstice, the Earth’s south pole is tilted towards the Sun. The Sun rises south of east, sets south of west and reaches 75 1/2° above the horizon at noon. This is, usually, the longest day of the year. Winter Solstice (22 June), Earth’s south pole is til ...
... Summer solstice (22 Dec) On the day of Summer Solstice, the Earth’s south pole is tilted towards the Sun. The Sun rises south of east, sets south of west and reaches 75 1/2° above the horizon at noon. This is, usually, the longest day of the year. Winter Solstice (22 June), Earth’s south pole is til ...
Life Cycle of a Star notes
... More mass than medium stars and continue the same life-cycle until they become Red Giants or Supergiants. Once nuclear fusion stops within the massive star, the energy is released in the form of a Supernova. ...
... More mass than medium stars and continue the same life-cycle until they become Red Giants or Supergiants. Once nuclear fusion stops within the massive star, the energy is released in the form of a Supernova. ...
What is a Star?
... a. absolute magnitude: actual brightness of a star (like absolute values in math) b. apparent magnitude: how bright a star appears based on its energy output, distance from you, & comparison to other stars ...
... a. absolute magnitude: actual brightness of a star (like absolute values in math) b. apparent magnitude: how bright a star appears based on its energy output, distance from you, & comparison to other stars ...
Condensation of the Solar Nebula
... Accretion: Formation of the Terrestrial Planets Accretion The process by which small ‘seeds’ grew into planets. • Near the Sun, where temperature is high, only metals and rocks can condense. The small pieces of metals and rocks (the planetesimals) collide and stick together to form larger piece of ...
... Accretion: Formation of the Terrestrial Planets Accretion The process by which small ‘seeds’ grew into planets. • Near the Sun, where temperature is high, only metals and rocks can condense. The small pieces of metals and rocks (the planetesimals) collide and stick together to form larger piece of ...
Discovery of the First Eclipsing Binary Barium Star
... of obsmdons in V for standard stars to be about 0.007 magnitude, he wncluded that 6 stars of the sample (which containd 17 M u m showed v&ations at or above the 3 o level. All stars were however obsened less than a dozen times under very different o b m I n g conditions and no lightcum is provided. ...
... of obsmdons in V for standard stars to be about 0.007 magnitude, he wncluded that 6 stars of the sample (which containd 17 M u m showed v&ations at or above the 3 o level. All stars were however obsened less than a dozen times under very different o b m I n g conditions and no lightcum is provided. ...
a description of planets and stars you may see
... combined. Surrounding the planet is a faint planetary ring system and at least 63 moons, including the four large moons called the Galilean moons that were first discovered by Galileo in 1610. Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest pla ...
... combined. Surrounding the planet is a faint planetary ring system and at least 63 moons, including the four large moons called the Galilean moons that were first discovered by Galileo in 1610. Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest pla ...
The Milky Way - University of North Texas
... a. Giant molecular clouds do not contain enough material. b. General relativity does not allow such massive objects to exist. c. The rotation rate is so high that such an object splits into a pair of stars. d. Objects above this mass fuse hydrogen too rapidly and cannot stay together. e. Objects abo ...
... a. Giant molecular clouds do not contain enough material. b. General relativity does not allow such massive objects to exist. c. The rotation rate is so high that such an object splits into a pair of stars. d. Objects above this mass fuse hydrogen too rapidly and cannot stay together. e. Objects abo ...
Measuring Radii and Temperatures of Stars
... • To avoid uncertainties in Teff and BC • Determine PV as a function of B-V PV(B-V)=logTeff – 0.1BC PV ( B V ) a b( B V ) c( B V ) 2 d ( B V )3 ...
... • To avoid uncertainties in Teff and BC • Determine PV as a function of B-V PV(B-V)=logTeff – 0.1BC PV ( B V ) a b( B V ) c( B V ) 2 d ( B V )3 ...
WORD - hrsbstaff.ednet.ns.ca
... the type of star, size of star, and the star’s stage of evolution. (d) It plots a star’s size and surface temperature, which allows astronomers determine its region of origin. 49. What is the Main Sequence? (a) The evolutionary path, as seen on the H-R diagram, that a star follows throughout its lif ...
... the type of star, size of star, and the star’s stage of evolution. (d) It plots a star’s size and surface temperature, which allows astronomers determine its region of origin. 49. What is the Main Sequence? (a) The evolutionary path, as seen on the H-R diagram, that a star follows throughout its lif ...
Outside the Solar System Outside the Solar System OUTSIDE THE
... and its many amazing features. Someday—perhaps even in students’ lifetimes—we may get answers to some key questions, including how the universe began and whether life exists anywhere besides on Earth. ...
... and its many amazing features. Someday—perhaps even in students’ lifetimes—we may get answers to some key questions, including how the universe began and whether life exists anywhere besides on Earth. ...
Was kann man von offenen Sternhaufen lernen?
... • Identical distance from the Sun: +- The volume expansion of the cluster • Identical age: +- Time scale of star formation • Identical metallicity: +- Inhomogeneities of the initial GMC and the chemical evolution of the ...
... • Identical distance from the Sun: +- The volume expansion of the cluster • Identical age: +- Time scale of star formation • Identical metallicity: +- Inhomogeneities of the initial GMC and the chemical evolution of the ...
Nov 2017 - What`s Out Tonight?
... everyone’s favorite because of its beautiful rings. Mars gets close galaxy like a halo. M22 in SAGITTARIUS is a northern favorite. to Earth about every 2 years at which time it is very bright. This A Planetary Nebula is an old term that has nothing to do is the best time to observe it but you need h ...
... everyone’s favorite because of its beautiful rings. Mars gets close galaxy like a halo. M22 in SAGITTARIUS is a northern favorite. to Earth about every 2 years at which time it is very bright. This A Planetary Nebula is an old term that has nothing to do is the best time to observe it but you need h ...
How to Directly Image a Habitable Planet Around Alpha Centauri
... contrast space telescopes (blue region in Figure 1) appear to be necessary. High contrast space telescopes in the 1 - 2.4m size range are realistic for launch in the 2020 decade, such as NASA’s planned WFIRST-AFTA mission [1], as well as the Exo-C and Exo-S concept studies [2, 3]. Such telescopes ca ...
... contrast space telescopes (blue region in Figure 1) appear to be necessary. High contrast space telescopes in the 1 - 2.4m size range are realistic for launch in the 2020 decade, such as NASA’s planned WFIRST-AFTA mission [1], as well as the Exo-C and Exo-S concept studies [2, 3]. Such telescopes ca ...
The Young Exoplanet Transit Initiative (YETI)
... so that we can expect at least about one young transiting object in this cluster. If we observe ∼10 similar clusters, we can expect to detect ∼10 young transiting planets with radius determinations. The precision given above is for a typical telescope of the YETI network, namely the 60/90-cm Jena te ...
... so that we can expect at least about one young transiting object in this cluster. If we observe ∼10 similar clusters, we can expect to detect ∼10 young transiting planets with radius determinations. The precision given above is for a typical telescope of the YETI network, namely the 60/90-cm Jena te ...
Life cycle of low mass stars
... Neutron star = similar to white dwarfs but smaller and more massive. Created by the massive collapse of a red supergiant. Earth would be the size of a football field and weigh 100 million tons High temperature but not very bright. Gravity > internal pressure Option 2: 6b. Black hole Black hole = obj ...
... Neutron star = similar to white dwarfs but smaller and more massive. Created by the massive collapse of a red supergiant. Earth would be the size of a football field and weigh 100 million tons High temperature but not very bright. Gravity > internal pressure Option 2: 6b. Black hole Black hole = obj ...
Last time: looked at proton-proton chain to convert Hydrogen into
... Stars exist in a state of hydrostatic equilibrium for most of their lives. This balances the inward force of gravity with the outward pressure of very hot gasses. ...
... Stars exist in a state of hydrostatic equilibrium for most of their lives. This balances the inward force of gravity with the outward pressure of very hot gasses. ...
Extension worksheet – Topic 6 - Cambridge Resources for the IB
... Spectroscopic parallax makes use of the formula so requires knowledge of luminosity and apparent brightness; apparent brightness can easily be measured with a CCD camera; the luminosity can be determined if we know the temperature of the star (obtained form its spectrum) and the stellar type so the ...
... Spectroscopic parallax makes use of the formula so requires knowledge of luminosity and apparent brightness; apparent brightness can easily be measured with a CCD camera; the luminosity can be determined if we know the temperature of the star (obtained form its spectrum) and the stellar type so the ...
ASTRONOMY 110G Review Questions for
... day and night? Why do we see different constellations at different times of night? At different times of year? Summarize the basic differences between the Ptolemaic, Copernican, and Keplerian descriptions of planetary, solar, and lunar motions. Explain why our Moon exhibits phases. Describe them, an ...
... day and night? Why do we see different constellations at different times of night? At different times of year? Summarize the basic differences between the Ptolemaic, Copernican, and Keplerian descriptions of planetary, solar, and lunar motions. Explain why our Moon exhibits phases. Describe them, an ...
Astronomy and Space articles
... Since writing recently about the first star to become visible in the evenings, which at this time of the year is Sirius, I have had a few questions about that star, and why it is so bright. Sirius is a brilliant star, visible high in our northern evening sky. It is quite easily identified by first l ...
... Since writing recently about the first star to become visible in the evenings, which at this time of the year is Sirius, I have had a few questions about that star, and why it is so bright. Sirius is a brilliant star, visible high in our northern evening sky. It is quite easily identified by first l ...
Astronomy 3020: Cosmology Samples for Exam 3
... younger at the end because a) She observed her stay-at-home brother’s clock to be running fast during the entire time of her trip b) He observed his travelling sister’s clock to be running very slow as she was acceleration away from Earth, turning around at Alpha Centauri and slowing down as she app ...
... younger at the end because a) She observed her stay-at-home brother’s clock to be running fast during the entire time of her trip b) He observed his travelling sister’s clock to be running very slow as she was acceleration away from Earth, turning around at Alpha Centauri and slowing down as she app ...