ASTR2050 Spring 2005 •
... We think of Population I stars as “young”, and made up of recycled materials. Population II stars are “old”, and might be made from primordial materials from the birth of the ...
... We think of Population I stars as “young”, and made up of recycled materials. Population II stars are “old”, and might be made from primordial materials from the birth of the ...
Spring and Summer Sky Observer
... be categorized as galaxies, globular clusters, open clusters, and nebulae. Galaxies are billions of stars held together by gravity. Some galaxies, like our own Milky Way, have a flattened, circular shape and are described as spiral. The Milky Way is about 100,000 light years in diameter and 1,000 li ...
... be categorized as galaxies, globular clusters, open clusters, and nebulae. Galaxies are billions of stars held together by gravity. Some galaxies, like our own Milky Way, have a flattened, circular shape and are described as spiral. The Milky Way is about 100,000 light years in diameter and 1,000 li ...
PowerPoint file - Adin Community Bible Church
... “The stars of our own galaxy, the Milky Way, rotate about the galactic center with different speeds, the inner ones rotating faster than the outer ones. The observed rotation speeds are so fast that if our galaxy were more than a few hundred million years old, it would be a featureless disc of stars ...
... “The stars of our own galaxy, the Milky Way, rotate about the galactic center with different speeds, the inner ones rotating faster than the outer ones. The observed rotation speeds are so fast that if our galaxy were more than a few hundred million years old, it would be a featureless disc of stars ...
Today`s Powerpoint
... - at least 30 kpc across - contains globular clusters, old stars, little gas and dust, much "dark matter" - roughly spherical ...
... - at least 30 kpc across - contains globular clusters, old stars, little gas and dust, much "dark matter" - roughly spherical ...
High-mass stars in the Galactic center Quintuplet cluster
... in the Near-Infrared (SINFONI) to observe the central parts of the Quintuplet cluster in 22 fields of 8 × 8 arcsec field of view, see Fig. 1 with a background composite HST image (HST program 7364, PI D. Figer, NICMOS F110W, F160W, and F205W). A spectral catalog of the point sources with 160 flux-ca ...
... in the Near-Infrared (SINFONI) to observe the central parts of the Quintuplet cluster in 22 fields of 8 × 8 arcsec field of view, see Fig. 1 with a background composite HST image (HST program 7364, PI D. Figer, NICMOS F110W, F160W, and F205W). A spectral catalog of the point sources with 160 flux-ca ...
Overview IR Astronomy Explore hidden universe , Cosmic dust, Cool
... visible light is shown for comparison (red and blue) (credit: ESO). Right: The massive star Eta Carinae in X-rays, visible light and submillimetre (credit: NASA/JCMT/H.Gomez et al.) ...
... visible light is shown for comparison (red and blue) (credit: ESO). Right: The massive star Eta Carinae in X-rays, visible light and submillimetre (credit: NASA/JCMT/H.Gomez et al.) ...
Make Your Own Star Bracelet
... cool stars. Much cooler than their bright blue-white cousins. Stars that are cooler than this type cannot be seen with eyes or optical telescopes. We must look for them by their heat, looking at their infrared radiation." "The next two beads tell us of two possible endings for stars." (pick up the ...
... cool stars. Much cooler than their bright blue-white cousins. Stars that are cooler than this type cannot be seen with eyes or optical telescopes. We must look for them by their heat, looking at their infrared radiation." "The next two beads tell us of two possible endings for stars." (pick up the ...
Star G has an apparent magnitude of +5.0 and an absolute
... • The mass is lost when two protons are converted to two neutrons • It takes energy to pull a helium nucleus apart • Helium atoms move so fast that they have a lower apparent mass ...
... • The mass is lost when two protons are converted to two neutrons • It takes energy to pull a helium nucleus apart • Helium atoms move so fast that they have a lower apparent mass ...
Ch. 13 GALAXIES
... B. Wide range of EM radiation II. Types of Active Galaxies A. ___________ galaxies – “normal” galaxies undergoing aggressive star formation due to interactions Ex/ M82 – The ______ Galaxy B. ____________ galaxies – resemble spirals, but with very energetic galactic _________ Ex/ NGC 7742 “Fried Egg” ...
... B. Wide range of EM radiation II. Types of Active Galaxies A. ___________ galaxies – “normal” galaxies undergoing aggressive star formation due to interactions Ex/ M82 – The ______ Galaxy B. ____________ galaxies – resemble spirals, but with very energetic galactic _________ Ex/ NGC 7742 “Fried Egg” ...
Living alongside Monsters: Matter around Central Massive Black Holes Q. Daniel Wang
... • The 1.9µm filter is sensitive to the stellar continuum emission. • The 1.87µm filter covers the Pα line. • Subtracting the 1.9µm map from the 1.87µm map adaptively. A net Pα line emission map (see the poster by Dong et al.; 415.01) . ...
... • The 1.9µm filter is sensitive to the stellar continuum emission. • The 1.87µm filter covers the Pα line. • Subtracting the 1.9µm map from the 1.87µm map adaptively. A net Pα line emission map (see the poster by Dong et al.; 415.01) . ...
AY2 - Overview of the Universe
... A) Without more information, it is impossible to know how fast you would see a light beam from Earth coming toward you. If it happens that you are going fast enough so that the light can't catch you, then people on Earth would find you to be going faster than light. B) An imaginary spaceship can go ...
... A) Without more information, it is impossible to know how fast you would see a light beam from Earth coming toward you. If it happens that you are going fast enough so that the light can't catch you, then people on Earth would find you to be going faster than light. B) An imaginary spaceship can go ...
Monthly Target Matrix Excel
... Each month the sky presents us with a dazzling assortment of spectacular objects on which to train our telescopes: variable stars, nebulae, galaxies, and clusters of galaxies, to name a few. As the Earth makes its yearly trip aroundthe Sun, different objects slide into view in the nighttime sky. Any ...
... Each month the sky presents us with a dazzling assortment of spectacular objects on which to train our telescopes: variable stars, nebulae, galaxies, and clusters of galaxies, to name a few. As the Earth makes its yearly trip aroundthe Sun, different objects slide into view in the nighttime sky. Any ...
Atoms and Elements
... • As its hydrogen is consumed, the star contracts, driving the core temperature up, and helium is fused to form heavier elements (as well as energy), ending up with iron and nickel. This process is referred to as helium burning. The outer layers of the star expand, producing a red giant. ...
... • As its hydrogen is consumed, the star contracts, driving the core temperature up, and helium is fused to form heavier elements (as well as energy), ending up with iron and nickel. This process is referred to as helium burning. The outer layers of the star expand, producing a red giant. ...
Major constellations
... widely known for containing the plough sometimes known as the big dipper. It has declination 50 degrees and right ascension 11 hours. It contains 16 stars, 5 galaxies,1 binary star and a planetary Nebula. According to some Native American legends, the bowl of the Big Dipper is a giant bear and the s ...
... widely known for containing the plough sometimes known as the big dipper. It has declination 50 degrees and right ascension 11 hours. It contains 16 stars, 5 galaxies,1 binary star and a planetary Nebula. According to some Native American legends, the bowl of the Big Dipper is a giant bear and the s ...
M-Dwarf Planet Occurrence in the Era of K2
... With the K2 Mission—successor of Kepler—now underway, new worlds await to be charted. The original Kepler mission surveyed mostly sun-‐like stars, finding planet candidates in the thousands. It also targe ...
... With the K2 Mission—successor of Kepler—now underway, new worlds await to be charted. The original Kepler mission surveyed mostly sun-‐like stars, finding planet candidates in the thousands. It also targe ...
l13
... In the 1930’s supernovae were recognised as a separate class of objects to novae (meaning new stars). • So-called by Fritz Zwicky, after Edwin Hubble estimated distance to Andromeda galaxy (through Cepheids) • Hence the luminosity of the “nova” discovered in 1885 in Andromeda was determined • Supern ...
... In the 1930’s supernovae were recognised as a separate class of objects to novae (meaning new stars). • So-called by Fritz Zwicky, after Edwin Hubble estimated distance to Andromeda galaxy (through Cepheids) • Hence the luminosity of the “nova” discovered in 1885 in Andromeda was determined • Supern ...
Piper_Evans - CoolWiki
... This study only allowed for YSOs that were detected in all Spitzer IRAC bands (3.6 – 8.0 micron) and Spitzer MIPS 20 micron and showing an infrared excess. This only allows for YSOs through Class II and the beginning stages of Class III as infrared excess diminishes in Class III. This method also mi ...
... This study only allowed for YSOs that were detected in all Spitzer IRAC bands (3.6 – 8.0 micron) and Spitzer MIPS 20 micron and showing an infrared excess. This only allows for YSOs through Class II and the beginning stages of Class III as infrared excess diminishes in Class III. This method also mi ...
Dynamical Interactions Make Hot Jupiters in Open Star Clusters
... of the inner Jupiters migrate into the 3 − 6 AU range. It is therefore not unexpected that strong interactions leading to large planet migrations become likely in our simulations. In fact, outer Jupiters are subsequently found as close in as 3 AU. Furthermore, a key result of this paper is that thre ...
... of the inner Jupiters migrate into the 3 − 6 AU range. It is therefore not unexpected that strong interactions leading to large planet migrations become likely in our simulations. In fact, outer Jupiters are subsequently found as close in as 3 AU. Furthermore, a key result of this paper is that thre ...
protostars and pre-main-sequence evolution.key
... using guessed central values for P, T, iterate until match with outer boundary conditions. ...
... using guessed central values for P, T, iterate until match with outer boundary conditions. ...
Goal: To understand the lifetime of a star and how the
... • Temperature: bigger star means higher temps both on surface and in the core. • Lifetimes: Bigger stars have shorter lives. • Color: Big main sequence stars are blue. ...
... • Temperature: bigger star means higher temps both on surface and in the core. • Lifetimes: Bigger stars have shorter lives. • Color: Big main sequence stars are blue. ...
Stellar Winds and Supernova Remnants: Interaction with the ISM
... V-band image of IRC+10216 showing shell-like structures in the circumstellar envelope (90''x 90'') Mauron & Huggins (2010) ...
... V-band image of IRC+10216 showing shell-like structures in the circumstellar envelope (90''x 90'') Mauron & Huggins (2010) ...
La teoria del big bang y la formacion del Universo
... • The key idea is that the universe is expanding. Consequently, the universe was denser and hotter in the past. Moreover, the Big Bang model suggests that at some moment all matter in the universe was contained in a single point, which is considered the beginning of the universe. ...
... • The key idea is that the universe is expanding. Consequently, the universe was denser and hotter in the past. Moreover, the Big Bang model suggests that at some moment all matter in the universe was contained in a single point, which is considered the beginning of the universe. ...
Implies dark halo for self-enrichment
... Repeated observations allow detection of variability: 110 non-variable (giant) stars (< 1km/s) Analyse spectra in pixel space; Retain full covariance: map model spectra onto data, find ‘best’ match values of stellar parameters (gravity, metallicity, surface temperature) ...
... Repeated observations allow detection of variability: 110 non-variable (giant) stars (< 1km/s) Analyse spectra in pixel space; Retain full covariance: map model spectra onto data, find ‘best’ match values of stellar parameters (gravity, metallicity, surface temperature) ...
Formation of the Oort Cloud28 Mar Assignment for Fri •
... a function of its semi‐major axis for different external perturbers. Dashed curves are for perturbers from the present galactic environment. Solid curves are for assumed perturbers in an early galactic environment. ...
... a function of its semi‐major axis for different external perturbers. Dashed curves are for perturbers from the present galactic environment. Solid curves are for assumed perturbers in an early galactic environment. ...
Planetary nebula
A planetary nebula, often abbreviated as PN or plural PNe, is a kind of emission nebula consisting of an expanding glowing shell of ionized gas ejected from old red giant stars late in their lives. The word ""nebula"" is Latin for mist or cloud and the term ""planetary nebula"" is a misnomer that originated in the 1780s with astronomer William Herschel because when viewed through his telescope, these objects appeared to him to resemble the rounded shapes of planets. Herschel's name for these objects was popularly adopted and has not been changed. They are a relatively short-lived phenomenon, lasting a few tens of thousands of years, compared to a typical stellar lifetime of several billion years.A mechanism for formation of most planetary nebulae is thought to be the following: at the end of the star's life, during the red giant phase, the outer layers of the star are expelled by strong stellar winds. Eventually, after most of the red giant's atmosphere is dissipated, the exposed hot, luminous core emits ultraviolet radiation to ionize the ejected outer layers of the star. Absorbed ultraviolet light energises the shell of nebulous gas around the central star, appearing as a bright coloured planetary nebula at several discrete visible wavelengths.Planetary nebulae may play a crucial role in the chemical evolution of the Milky Way, returning material to the interstellar medium from stars where elements, the products of nucleosynthesis (such as carbon, nitrogen, oxygen and neon), have been created. Planetary nebulae are also observed in more distant galaxies, yielding useful information about their chemical abundances.In recent years, Hubble Space Telescope images have revealed many planetary nebulae to have extremely complex and varied morphologies. About one-fifth are roughly spherical, but the majority are not spherically symmetric. The mechanisms which produce such a wide variety of shapes and features are not yet well understood, but binary central stars, stellar winds and magnetic fields may play a role.