Introduction to Telescopes
... rotates) around the axis that connects the north and south celestial poles. At the latitude of Brown University, the pole star is at an altitude of approximately 41 degrees. Suppose that we would like our telescope to be able to track the motions of the stars as trace giant circles around the pole s ...
... rotates) around the axis that connects the north and south celestial poles. At the latitude of Brown University, the pole star is at an altitude of approximately 41 degrees. Suppose that we would like our telescope to be able to track the motions of the stars as trace giant circles around the pole s ...
Chapter 8 Formation of Stars
... • Observation of many hot O and B spectral class stars in and near nebulae is a rather strong indicator that stars are being born there. • These stars are so luminous that they must consume their nuclear fuel at a prodigious rate. • Their time on the main sequence is probably only a million years or ...
... • Observation of many hot O and B spectral class stars in and near nebulae is a rather strong indicator that stars are being born there. • These stars are so luminous that they must consume their nuclear fuel at a prodigious rate. • Their time on the main sequence is probably only a million years or ...
Chapter 7 Formation of Stars
... • Observation of many hot O and B spectral class stars in and near nebulae is a rather strong indicator that stars are being born there. • These stars are so luminous that they must consume their nuclear fuel at a prodigious rate. • Their time on the main sequence is probably only a million years or ...
... • Observation of many hot O and B spectral class stars in and near nebulae is a rather strong indicator that stars are being born there. • These stars are so luminous that they must consume their nuclear fuel at a prodigious rate. • Their time on the main sequence is probably only a million years or ...
Lecture Slides – Stars
... work and Bahcall's careful analysis. The oscillations were, I believed, uncalled for." ...
... work and Bahcall's careful analysis. The oscillations were, I believed, uncalled for." ...
Autoguiding - Thrush Observatory
... no more difficult or complicated than using an off-axis guider if one follows a few simple rules. • The most fundamental mistake is to attempt to mount the guide scope directly to the primary tube. A guide scope is just too heavy and will bend the main tube in all sorts of random ways when in use. • ...
... no more difficult or complicated than using an off-axis guider if one follows a few simple rules. • The most fundamental mistake is to attempt to mount the guide scope directly to the primary tube. A guide scope is just too heavy and will bend the main tube in all sorts of random ways when in use. • ...
26.2 Stars - Clinton Public Schools
... which generates energy through nuclear fusion in its core. The closest star to Earth is the sun, which is considered to be a fairly average star. ...
... which generates energy through nuclear fusion in its core. The closest star to Earth is the sun, which is considered to be a fairly average star. ...
THREE INTRIGUER NEBULAE IN CONSTELLATION CARINA
... eastern part of this constellation (see picture on first page). Antlia cluster, also known as ACO S 0636, is centered at R.A. 10h 30m 01s Dec. –35° 19´ 35”. With a galactic latitude of 19 degrees it is not too far from the Zone of Avoidance (ZOA), a narrow band on the sky in which very few galaxies ...
... eastern part of this constellation (see picture on first page). Antlia cluster, also known as ACO S 0636, is centered at R.A. 10h 30m 01s Dec. –35° 19´ 35”. With a galactic latitude of 19 degrees it is not too far from the Zone of Avoidance (ZOA), a narrow band on the sky in which very few galaxies ...
6 Minute English
... In terms of its current lifestyle it’s here for as long again, so we’re about half way through. And then it becomes a different sort of star – it becomes a giant star and that’s probably curtains for us, actually. It’ll get a bit warm, a bit toasty, and we’ll get enveloped in the sun, and it won’t b ...
... In terms of its current lifestyle it’s here for as long again, so we’re about half way through. And then it becomes a different sort of star – it becomes a giant star and that’s probably curtains for us, actually. It’ll get a bit warm, a bit toasty, and we’ll get enveloped in the sun, and it won’t b ...
Living with a Red Dwarf - Center for Space and Habitability (CSH)
... • Very shortwave ultraviolet (EUV) and X-rays are absorbed high up in the atmosphere, and heat it to the point where the atmosphere can escape to space. • i.e. it’s the rocket fuel that brings molecules up to escape velocity and can launch atmosphere out of the gravity well. • Shorter wave ultraviol ...
... • Very shortwave ultraviolet (EUV) and X-rays are absorbed high up in the atmosphere, and heat it to the point where the atmosphere can escape to space. • i.e. it’s the rocket fuel that brings molecules up to escape velocity and can launch atmosphere out of the gravity well. • Shorter wave ultraviol ...
Solar-like oscillations in intermediate red giants
... There are modes with inertia similar to that of a radial modes. In principle, this modes might be excited to an observable level throught stochastic ...
... There are modes with inertia similar to that of a radial modes. In principle, this modes might be excited to an observable level throught stochastic ...
Document
... optical range and in X-rays. Cross-correlation between SDSS and ROSAT data resulted in 57 candidates. ...
... optical range and in X-rays. Cross-correlation between SDSS and ROSAT data resulted in 57 candidates. ...
The Early Evolution of Protostars
... The initial conditions for planet formation may be determined by time since last episode of disk instability ...
... The initial conditions for planet formation may be determined by time since last episode of disk instability ...
2 Coordinate systems
... equinox. In section 2.8 the ecliptic and celestial equator were considered as fixed great circles on the celestial sphere, and thus the vernal equinox as a fixed point. However, there are both the phenomena of precession and nutation3 so the celestial equator cannot be considered as a fixed great ci ...
... equinox. In section 2.8 the ecliptic and celestial equator were considered as fixed great circles on the celestial sphere, and thus the vernal equinox as a fixed point. However, there are both the phenomena of precession and nutation3 so the celestial equator cannot be considered as a fixed great ci ...
Document
... The Habitable Zone When we look at other star systems, one of the first things we look for is what’s called the “habitable zone”. This is the area in the star system where you’d be just the right distance for water to be liquid. Why? Because it might mean a planet like Earth that we could someday c ...
... The Habitable Zone When we look at other star systems, one of the first things we look for is what’s called the “habitable zone”. This is the area in the star system where you’d be just the right distance for water to be liquid. Why? Because it might mean a planet like Earth that we could someday c ...
Chapter-by-Chapter Guide
... were on top of everything else. This suggests that the universe may have been very tiny and dense at some point in the distant past and has been expanding ever since. This beginning is what we call the Big Bang. Most of the atoms in our bodies (all the elements except for hydrogen, since our bodies ...
... were on top of everything else. This suggests that the universe may have been very tiny and dense at some point in the distant past and has been expanding ever since. This beginning is what we call the Big Bang. Most of the atoms in our bodies (all the elements except for hydrogen, since our bodies ...
Slide 1
... small fraction of an arm sitting between two larger arms. 99% of the stars we see in the sky are in this spur. ...
... small fraction of an arm sitting between two larger arms. 99% of the stars we see in the sky are in this spur. ...
SPECIAL REPORT
... of about 15 Earth-masses. New models of Jupiter’s interior suggest it possesses a core smaller than 3 Earth-masses. If correct, Jupiter couldn’t have formed by core accretion unless it formed with a much bigger core than it now has. Can the cores of giant planets erode over time? If so, then core ma ...
... of about 15 Earth-masses. New models of Jupiter’s interior suggest it possesses a core smaller than 3 Earth-masses. If correct, Jupiter couldn’t have formed by core accretion unless it formed with a much bigger core than it now has. Can the cores of giant planets erode over time? If so, then core ma ...
- University of Manitoba
... discovered by Johann Elert Bode in 1774. Its classified as a prototype Starburst Galaxy of the second type, famous for its heavy star formation due to its close encounter with its neighbouring galaxy M81. M82 is five times as bright as the entire milky way galaxy, and 100 times as bright as the ...
... discovered by Johann Elert Bode in 1774. Its classified as a prototype Starburst Galaxy of the second type, famous for its heavy star formation due to its close encounter with its neighbouring galaxy M81. M82 is five times as bright as the entire milky way galaxy, and 100 times as bright as the ...
Low-Mass Star Formation Triggered by Supernova in Primordial
... low temperature gas ⇒ small Jeans mass ⇒ low mass star formation In early Universe (no dust, no metal), the gas cools to about 300-500K ...
... low temperature gas ⇒ small Jeans mass ⇒ low mass star formation In early Universe (no dust, no metal), the gas cools to about 300-500K ...
Disk Instability Models
... • Surface T = 50 K means lower midplane T • No artificial viscosity so no irreversible heating in shock fronts and a =0 assumed • Cooling time ~ 1-2 P ...
... • Surface T = 50 K means lower midplane T • No artificial viscosity so no irreversible heating in shock fronts and a =0 assumed • Cooling time ~ 1-2 P ...
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.