SSG Coordinators will be at the Cronan Ranch observing site at 5
... Sisters. Mistaken by some to be the Little Dipper, the stars of the Pleiades were formed from a contracting cloud of gas and dust about 20 million years ago. At a distance of only 407 light years from us, the nine brightest stars encompass a true diameter of 7 light years. These new, very hot type O ...
... Sisters. Mistaken by some to be the Little Dipper, the stars of the Pleiades were formed from a contracting cloud of gas and dust about 20 million years ago. At a distance of only 407 light years from us, the nine brightest stars encompass a true diameter of 7 light years. These new, very hot type O ...
PX269 Galaxies The University of Warwick
... 2) Sketch the Hubble classification scheme for normal galaxies and describe the main features of each class of galaxy. ...
... 2) Sketch the Hubble classification scheme for normal galaxies and describe the main features of each class of galaxy. ...
The Internal Structure of Stars Computational Mechanics Project Fall
... P is the pressure (dynes/cm2), is the density (g/cm3), G is gravitational constant (6.67x10-8dyne cm^2/g2), r is the radial position from the center (cm), M is the mass inside radius r (g), Lr is the energy emitted outward from radius r (erg/s), is the energy generated per unit mass (erg/g-s), T ...
... P is the pressure (dynes/cm2), is the density (g/cm3), G is gravitational constant (6.67x10-8dyne cm^2/g2), r is the radial position from the center (cm), M is the mass inside radius r (g), Lr is the energy emitted outward from radius r (erg/s), is the energy generated per unit mass (erg/g-s), T ...
Reading the Stars
... Stars come in many sizes and colors. It turns out that knowing a star’s color and size can tell you where it is in its evolutionary cycle. Stars evolve from protostars to stellar remnants on timescales of hundreds of millions to hundreds of billions of years. Astronomy has not been around that long ...
... Stars come in many sizes and colors. It turns out that knowing a star’s color and size can tell you where it is in its evolutionary cycle. Stars evolve from protostars to stellar remnants on timescales of hundreds of millions to hundreds of billions of years. Astronomy has not been around that long ...
Document
... come from? The new stars continue to contract because of gravity. The increasing pressure heats the nucleus of the star and makes it shine. If gravity was the only source of energy our Sun would shine for less than 18,000,000 years. There must be another source of energy. ...
... come from? The new stars continue to contract because of gravity. The increasing pressure heats the nucleus of the star and makes it shine. If gravity was the only source of energy our Sun would shine for less than 18,000,000 years. There must be another source of energy. ...
30 Doradus - HubbleSOURCE
... come from? The new stars continue to contract because of gravity. The increasing pressure heats the nucleus of the star and makes it shine. If gravity was the only source of energy our Sun would shine for less than 18,000,000 years. There must be another source of energy. ...
... come from? The new stars continue to contract because of gravity. The increasing pressure heats the nucleus of the star and makes it shine. If gravity was the only source of energy our Sun would shine for less than 18,000,000 years. There must be another source of energy. ...
Power-point version of presentation
... Churchwell et al. - Galactic Planet Survey Evans et al. - Galactic star formation ...
... Churchwell et al. - Galactic Planet Survey Evans et al. - Galactic star formation ...
The Life Cycles of Stars
... Black Holes- Black holes are another resulting body created after a supernova, usually having to be greater than at least 3.0 solar masses. When a star collapses at such a size, the stellar object becomes incredibly small and dense, resulting in a gravitational pull so powerful that radiation (heat) ...
... Black Holes- Black holes are another resulting body created after a supernova, usually having to be greater than at least 3.0 solar masses. When a star collapses at such a size, the stellar object becomes incredibly small and dense, resulting in a gravitational pull so powerful that radiation (heat) ...
Reach_for_the_stars_final_questions.doc
... 13. For the sake of convenience, astronomers have divided the sky into 88 constellations. In which of these does the current Polar star, Polaris, lie? (1pt) ...
... 13. For the sake of convenience, astronomers have divided the sky into 88 constellations. In which of these does the current Polar star, Polaris, lie? (1pt) ...
Searching for stars in high-velocity clouds
... A large number of HVCs (velocities greater than about ±100 km s−1 compared with the local standard of rest) have now been detected in extensive surveys of the sky (Hartman & Burton 1997; Wakker & van Woerden 1991; Putman et al. 2002). The nature of these clouds has been debated a number of times ove ...
... A large number of HVCs (velocities greater than about ±100 km s−1 compared with the local standard of rest) have now been detected in extensive surveys of the sky (Hartman & Burton 1997; Wakker & van Woerden 1991; Putman et al. 2002). The nature of these clouds has been debated a number of times ove ...
Sample Exam for Final (with correct answers)
... (e) We know the times of giant explosions in these galaxies, then measure the time the light signals arrive at Earth. 23. The physical significance of the Hubble Constant is that it (a) corresponds to the time since the universe began to expand. ∗ (b) gives the total mass of the universe. (c) repres ...
... (e) We know the times of giant explosions in these galaxies, then measure the time the light signals arrive at Earth. 23. The physical significance of the Hubble Constant is that it (a) corresponds to the time since the universe began to expand. ∗ (b) gives the total mass of the universe. (c) repres ...
red shift summary sheet
... scientific experts have come up with a theory for creation called the big bang which has scientific proof! This theory involves a great explosion where everything in the known universe was formed. All the energy and matter found today in the universe expanded from tiny point and formed the galaxies, ...
... scientific experts have come up with a theory for creation called the big bang which has scientific proof! This theory involves a great explosion where everything in the known universe was formed. All the energy and matter found today in the universe expanded from tiny point and formed the galaxies, ...
Astronomy (stars, galaxies and the Universe)
... Stars located above the north and south poles, called circumpolar stars, appear to move in circles above the horizon each night Astronomers use constellations as landmarks to locate other objects in the sky ...
... Stars located above the north and south poles, called circumpolar stars, appear to move in circles above the horizon each night Astronomers use constellations as landmarks to locate other objects in the sky ...
Astronomy (stars, galaxies and the Universe)
... Typically smaller than other types of galaxies Generally have many bright young stars and lots of gas and dust to form new stars ...
... Typically smaller than other types of galaxies Generally have many bright young stars and lots of gas and dust to form new stars ...
Lecture 13. Black Holes - Politechnika Wrocławska
... • For more than 90% of a typical star’s lifetime, it is on the Main Sequence of H-R Diagram – With stable Hydrogen burning in the core – The luminosity, temperature and mass of main sequence star follow simple relation: • High mass stars: – Hotter, more luminous, bigger, and have shorter lifetime ...
... • For more than 90% of a typical star’s lifetime, it is on the Main Sequence of H-R Diagram – With stable Hydrogen burning in the core – The luminosity, temperature and mass of main sequence star follow simple relation: • High mass stars: – Hotter, more luminous, bigger, and have shorter lifetime ...
Merak
... How Far Away: 62 light years away How Bright: About 50 times brighter than the Sun Where to View: In the constellation Ursa Major. When to View:All year round in the Northern Hemisphere ...
... How Far Away: 62 light years away How Bright: About 50 times brighter than the Sun Where to View: In the constellation Ursa Major. When to View:All year round in the Northern Hemisphere ...
The origin of the high gas temperatures in Galactic Center molecular
... Detailed gas temperature maps of seven molecular clouds in the CMZ, using the H2CO thermometer and other temperature tracers (CH3CN, CH3CCH, CH3OH) ...
... Detailed gas temperature maps of seven molecular clouds in the CMZ, using the H2CO thermometer and other temperature tracers (CH3CN, CH3CCH, CH3OH) ...
The Application of Forbidden Line X-Ray Diagnostics to the Hot Star
... intercombination line indicates the strength of the UV field.* In a strong UV field, electrons are often excited out of the long-lived upper level of the forbidden line before they spontaneously de-excite, weakening the forbidden line. * If electron densities are high enough, collisional excitation ...
... intercombination line indicates the strength of the UV field.* In a strong UV field, electrons are often excited out of the long-lived upper level of the forbidden line before they spontaneously de-excite, weakening the forbidden line. * If electron densities are high enough, collisional excitation ...
Lecture 5: The Milky Way
... Tangential orbital speed V (km/sec) Thin-disc stars follow nearly circular orbits, with most of their motion being tangential. Halo stars are equally likely to follow prograde or retrograde orbits and cross the midplane with high speeds. ...
... Tangential orbital speed V (km/sec) Thin-disc stars follow nearly circular orbits, with most of their motion being tangential. Halo stars are equally likely to follow prograde or retrograde orbits and cross the midplane with high speeds. ...
Part1
... o Key components of a galaxy and its ISM? Which are observable from the 30m? o What does the zoomed out SED of a galaxy look like? Where do IR and mm fit in? o Scaling relations in nearby galaxies and their relation to IR and mm work. ...
... o Key components of a galaxy and its ISM? Which are observable from the 30m? o What does the zoomed out SED of a galaxy look like? Where do IR and mm fit in? o Scaling relations in nearby galaxies and their relation to IR and mm work. ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.