Take time to understand it now
... Galactic open clusters are laboratories, provided by nature, for us to study stellar evolution. Using 1m-, 4m- and 8m-class telescopes, I will show how spectroscopic and photometric observations of solar-type stars in open clusters allow us to establish a stellar chronometer, and create an age-ranki ...
... Galactic open clusters are laboratories, provided by nature, for us to study stellar evolution. Using 1m-, 4m- and 8m-class telescopes, I will show how spectroscopic and photometric observations of solar-type stars in open clusters allow us to establish a stellar chronometer, and create an age-ranki ...
Characterizing Extrasolar Planetary Systems
... To discover the diversity of planetary systems and understand how planets form, new measurement capabilities will be required, surpassing those available in observatories currently under development, such as Herschel, JWST, and ALMA. Instead what is needed are sensitive, space-based far-infrared mea ...
... To discover the diversity of planetary systems and understand how planets form, new measurement capabilities will be required, surpassing those available in observatories currently under development, such as Herschel, JWST, and ALMA. Instead what is needed are sensitive, space-based far-infrared mea ...
document
... • Many ancient peoples worshiped the Sun as a god. They thought a solar eclipse meant the god was angry with them. They believed the Sun god's anger could only be calmed with prayer and sacrifice. ...
... • Many ancient peoples worshiped the Sun as a god. They thought a solar eclipse meant the god was angry with them. They believed the Sun god's anger could only be calmed with prayer and sacrifice. ...
1.2 Characterize gas and ice giant exoplanets to constrain
... To discover the diversity of planetary systems and understand how planets form, new measurement capabilities will be required, surpassing those available in observatories currently under development, such as Herschel, JWST, and ALMA. Instead what is needed are sensitive, space-based far-infrared mea ...
... To discover the diversity of planetary systems and understand how planets form, new measurement capabilities will be required, surpassing those available in observatories currently under development, such as Herschel, JWST, and ALMA. Instead what is needed are sensitive, space-based far-infrared mea ...
From galaxies to stars
... gets hot enough for the next ignition stage. Instead, the star ejects its outer layers in a series of belches, and this gas expands into space. Lit by the central remnant, which is now a white dwarf, we see this glowing gas as a planetary nebula. ...
... gets hot enough for the next ignition stage. Instead, the star ejects its outer layers in a series of belches, and this gas expands into space. Lit by the central remnant, which is now a white dwarf, we see this glowing gas as a planetary nebula. ...
Blowing up warped disks
... Abstract. Stars do not go gently: even low-mass stars such as our Sun blow up in the end, seeding space with the elements of which we are made. Usually, the resulting nebulae show a pronounced bipolar or even multipolar shape. Balick’s “generalized interacting-winds” model posits that this is due to ...
... Abstract. Stars do not go gently: even low-mass stars such as our Sun blow up in the end, seeding space with the elements of which we are made. Usually, the resulting nebulae show a pronounced bipolar or even multipolar shape. Balick’s “generalized interacting-winds” model posits that this is due to ...
ECLIPSE, Volume 1, Number 3, March - April 2017
... impact how structure forms in the universe, and how gravity pulls gas and dust together into clusters and galaxies. So by looking at the big scale, scientists can better constrain how massive neutrinos are. In 2014, another South Pole telescope called BICEP2 detected polarization modes (known as B m ...
... impact how structure forms in the universe, and how gravity pulls gas and dust together into clusters and galaxies. So by looking at the big scale, scientists can better constrain how massive neutrinos are. In 2014, another South Pole telescope called BICEP2 detected polarization modes (known as B m ...
declarative interrogative imperative
... Astronomers can determine the age of a star by observing it closely. ...
... Astronomers can determine the age of a star by observing it closely. ...
The Population of Stars
... • Distances to the nearer stars can be determined by parallax, the apparent shift of a star against the background stars observed as the Earth moves along its orbit • Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Eart ...
... • Distances to the nearer stars can be determined by parallax, the apparent shift of a star against the background stars observed as the Earth moves along its orbit • Parallax measurements made from orbit, above the blurring effects of the atmosphere, are much more accurate than those made with Eart ...
Where do chemical elements come from?
... hydrogen in stars. 3. Name the stellar process in which the fusion of hydrogen produces other elements. ...
... hydrogen in stars. 3. Name the stellar process in which the fusion of hydrogen produces other elements. ...
Spin-Orbit Angles as a Probe to Orbital Evolution
... to Teff <6150 K. Tides are dissipated more effectively when there is an outer convective layer (Zahn 1977). Winn et al. (2010) have postulated that tides have changed the distribution in spin-orbit angles of planets orbiting stars <6150K, but left the distribution intact for systems >6350K. It is stil ...
... to Teff <6150 K. Tides are dissipated more effectively when there is an outer convective layer (Zahn 1977). Winn et al. (2010) have postulated that tides have changed the distribution in spin-orbit angles of planets orbiting stars <6150K, but left the distribution intact for systems >6350K. It is stil ...
01 - Awtrey Middle School
... 2. During which stage of the life cycle is a star a ball of gas and dust? a. first stage b. second stage c. third stage d. last stage 3. What gas does hydrogen change into as a star becomes hotter? a. uranium b. helium c. gravity d. carbon DIFFERENT TYPES OF STARS 4. Which of the following is NOT a ...
... 2. During which stage of the life cycle is a star a ball of gas and dust? a. first stage b. second stage c. third stage d. last stage 3. What gas does hydrogen change into as a star becomes hotter? a. uranium b. helium c. gravity d. carbon DIFFERENT TYPES OF STARS 4. Which of the following is NOT a ...
Sailing along River Eridani
... southern stream. Except for the brilliant 0.53 magnitude “Achernar”, the ninth brightest star in the sky, this constellation has no stars brighter than magnitude 3. Follow the southern stream from Achernar to the east and it is easy to pretend that the river flows to the sea as Beta Eridani with the ...
... southern stream. Except for the brilliant 0.53 magnitude “Achernar”, the ninth brightest star in the sky, this constellation has no stars brighter than magnitude 3. Follow the southern stream from Achernar to the east and it is easy to pretend that the river flows to the sea as Beta Eridani with the ...
Solutions to test #2 taken on Tuesday
... c) ____F____ The convection layer in the Sun is transparent to radiation. d) ____F____ Nuclear fusion is the breaking apart of a heavy atomic nucleus into two smaller nuclei. e) ____T____ No light produced in the core of the Sun ever reaches the surface. f) ____T____ Near the event horizon of a blac ...
... c) ____F____ The convection layer in the Sun is transparent to radiation. d) ____F____ Nuclear fusion is the breaking apart of a heavy atomic nucleus into two smaller nuclei. e) ____T____ No light produced in the core of the Sun ever reaches the surface. f) ____T____ Near the event horizon of a blac ...
Friday, April 26
... Mira Stars • Mira (=wonderful, lat.) [o Ceti]: sometimes visible with bare eye, sometimes faint • Long period variable star: 332 days period • Cool red giants • Sometimes periodic, sometimes irregular • some eject gas into space ...
... Mira Stars • Mira (=wonderful, lat.) [o Ceti]: sometimes visible with bare eye, sometimes faint • Long period variable star: 332 days period • Cool red giants • Sometimes periodic, sometimes irregular • some eject gas into space ...
Friday, February 12, 2016 Astronomy in the news?
... Goal: to understand the origin of Type II, Ib, Ic ...
... Goal: to understand the origin of Type II, Ib, Ic ...
Chapter22_New
... 1. Interstellar Matter To show the students why emission nebulae have the distinctive reddish color they do, I turn down the light and turn on a hydrogen discharge tube. The excitation mechanism may be different for HII regions, but the emission line output is the same. 2. The Shape and Size of the ...
... 1. Interstellar Matter To show the students why emission nebulae have the distinctive reddish color they do, I turn down the light and turn on a hydrogen discharge tube. The excitation mechanism may be different for HII regions, but the emission line output is the same. 2. The Shape and Size of the ...
South Pasadena • Chemistry Name 8 • Nuclear Chemistry Period
... For more than 50 years, scientists have been studying the links between chemical elements and how they are created. Elements lighter than iron are formed from successive nuclear fusion reactions, beginning with hydrogen atoms. All stars form iron in their cores. ...
... For more than 50 years, scientists have been studying the links between chemical elements and how they are created. Elements lighter than iron are formed from successive nuclear fusion reactions, beginning with hydrogen atoms. All stars form iron in their cores. ...
Tuesday Nov 14 Agenda Saturn`s Hurricane
... • They were further from the Sun and gravity was weaker • They formed beyond the frost line where ices can condense so they included hydrogen compounds • They were far enough from the Sun to escape the heavy bombardment that battered the early solar system ...
... • They were further from the Sun and gravity was weaker • They formed beyond the frost line where ices can condense so they included hydrogen compounds • They were far enough from the Sun to escape the heavy bombardment that battered the early solar system ...
Powerpoint of lecture 16
... • L ~ constant (at Lshell), and L R2Teff4, so Teff drops as star expands – becomes red giant Expansion on thermal timescale, implies evolution across HR diagram very fast: accounts for Hertzsprung gap ...
... • L ~ constant (at Lshell), and L R2Teff4, so Teff drops as star expands – becomes red giant Expansion on thermal timescale, implies evolution across HR diagram very fast: accounts for Hertzsprung gap ...
大爆炸---宇宙的起源 - 中正大學化學系
... body thermal energy coming from all parts of the sky. The radiation is isotropic to roughly one part in 100,000. As the universe expanded, adiabatic cooling caused the plasma to lose energy until it became favorable for electrons to combine with protons, forming hydrogen atoms. This recombination ev ...
... body thermal energy coming from all parts of the sky. The radiation is isotropic to roughly one part in 100,000. As the universe expanded, adiabatic cooling caused the plasma to lose energy until it became favorable for electrons to combine with protons, forming hydrogen atoms. This recombination ev ...
Lyra - columbusastronomy
... was soon bitten by a snake and died from the poison. He went to the underworld to try and find her. He charmed the king and queen of the underworld with his music and they granted him permission to take her back to the land of the living. Orpheus received her, but on condition that he must not look ...
... was soon bitten by a snake and died from the poison. He went to the underworld to try and find her. He charmed the king and queen of the underworld with his music and they granted him permission to take her back to the land of the living. Orpheus received her, but on condition that he must not look ...
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.