It is only in the past few years that humanity... limits of the heliosphere. A fortunate confluence of missions has... 1. Magnetic Effects in the Heliosheath and Astrosheaths (Prof. Merav...
... (Prof. Alan Marscher & Senior Research Scientist Svetlana Jorstad) Blazars – the most extreme class of active nuclei of galaxies – contain supermassive (up to 20 billion times the mass of the Sun) black holes that accrete gas from the central regions of the host galaxy. Jets stream out of the nucleu ...
... (Prof. Alan Marscher & Senior Research Scientist Svetlana Jorstad) Blazars – the most extreme class of active nuclei of galaxies – contain supermassive (up to 20 billion times the mass of the Sun) black holes that accrete gas from the central regions of the host galaxy. Jets stream out of the nucleu ...
5→2 3→2
... 5. Compare the spectrum of the fluorescent light bulb to the spectra of the gases in the discharge tube. Note that the fluorescent light could have several gases in it so look for a gas all of whose lines are seen the fluorescent light's spectrum. What gas do you think is in the fluorescent light bu ...
... 5. Compare the spectrum of the fluorescent light bulb to the spectra of the gases in the discharge tube. Note that the fluorescent light could have several gases in it so look for a gas all of whose lines are seen the fluorescent light's spectrum. What gas do you think is in the fluorescent light bu ...
Oct 2017 - What`s Out Tonight?
... tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky are part of our Milky sible to see the moons with well-focused binoculars. Saturn is Way Galaxy, and there are about 200 of ...
... tens of thousands stars held together by their mutual gravity. All Galilean moons and cloud bands, easily visible at 50x. It is posof the globulars that can be seen in the sky are part of our Milky sible to see the moons with well-focused binoculars. Saturn is Way Galaxy, and there are about 200 of ...
The formation of the Solar System I. Stellar context
... our galaxy near regions of gas and dust. ...
... our galaxy near regions of gas and dust. ...
Warm gas in protoplanetary disks van der Plas, G. - UvA-DARE
... The search for planets outside of our solar system (exoplanets), and in particular, the search for a second Earth on which life as we know it could exist, is one of the most tantalizing subjects in current astronomy. Since the first discovery of such a planet orbiting a young star 15 years ago, many ...
... The search for planets outside of our solar system (exoplanets), and in particular, the search for a second Earth on which life as we know it could exist, is one of the most tantalizing subjects in current astronomy. Since the first discovery of such a planet orbiting a young star 15 years ago, many ...
91KB - NZQA
... • blue / white giant • supernova • black hole. The birth stage is explained: A very large GMC condenses under gravity to become dense. As it condenses, the particles become hotter (due to friction) and eventually become hot enough to become a protostar. Rigel birth explained with associated energy c ...
... • blue / white giant • supernova • black hole. The birth stage is explained: A very large GMC condenses under gravity to become dense. As it condenses, the particles become hotter (due to friction) and eventually become hot enough to become a protostar. Rigel birth explained with associated energy c ...
Oscillating White Dwarf Stars Background on White Dwarfs
... This is the spectrum of a DA white dwarf. It looks like an A-type star except the lines are even more pressure broadened due to the high gravity. The few and broad lines means that most studies of pulsating white dwarfs are done with photometry rather than radial velocities ...
... This is the spectrum of a DA white dwarf. It looks like an A-type star except the lines are even more pressure broadened due to the high gravity. The few and broad lines means that most studies of pulsating white dwarfs are done with photometry rather than radial velocities ...
Virtual HR Diagram Lab
... 8. Uncheck show luminosity classes and check show instability strip. Note that this region of the HR Diagram indicates where pulsating stars are found such as RR Lyrae stars and Cepheid variable stars. These stars vary in brightness because they are pulsating-alternately growing bigger and smaller- ...
... 8. Uncheck show luminosity classes and check show instability strip. Note that this region of the HR Diagram indicates where pulsating stars are found such as RR Lyrae stars and Cepheid variable stars. These stars vary in brightness because they are pulsating-alternately growing bigger and smaller- ...
Chapter 18 - Origin and Evolution of Stars Chapter Preview
... end of the life of a high-mass star that destroys the star and blows away most of its mass at supersonic velocities, several thousand kilometers per second (Figure 2). As this supersonic gas plows through the interstellar medium it smacks into giant molecular clouds, compressing them enough to trigg ...
... end of the life of a high-mass star that destroys the star and blows away most of its mass at supersonic velocities, several thousand kilometers per second (Figure 2). As this supersonic gas plows through the interstellar medium it smacks into giant molecular clouds, compressing them enough to trigg ...
Lecture 15 Star Formation and Evolution 3/7
... about 100,000,000 degrees K for He burning Stars like our Sun remain main sequence longer due to this PHYS 162 ...
... about 100,000,000 degrees K for He burning Stars like our Sun remain main sequence longer due to this PHYS 162 ...
Some Examples of Virtual Observatory Enabled Science What Are the Some Distinguishing
... • Only ~ 10 - 20% of galaxies live in clusters, but it is hard to draw the line between groups and clusters, and at least ~50% of all galaxies are in clusters or groups • Clusters have higher densities than groups, contain a majority of E’s and S0’s while groups are dominated by spirals • Interestin ...
... • Only ~ 10 - 20% of galaxies live in clusters, but it is hard to draw the line between groups and clusters, and at least ~50% of all galaxies are in clusters or groups • Clusters have higher densities than groups, contain a majority of E’s and S0’s while groups are dominated by spirals • Interestin ...
GRB Progenitors and their environments
... Cassiopeia A: A well constrained core-collapse SN • Cas A is a well studied remnant, with constraints on yield, explosion energy, and ejecta mass. Recently, an integrated spectrum has been observed through light echoes. More data expected (NuSTAR will map the 44Ti production). • Progenitor likely t ...
... Cassiopeia A: A well constrained core-collapse SN • Cas A is a well studied remnant, with constraints on yield, explosion energy, and ejecta mass. Recently, an integrated spectrum has been observed through light echoes. More data expected (NuSTAR will map the 44Ti production). • Progenitor likely t ...
Stellar Population Modeling of Galaxies in Nearby Groups
... dwarf galaxies are the best places to study the processes of star formation. SFHs of the Local Group dwarf galaxies were studied in details from deep images, which were obtained with large ground-based telescopes and the Hubble Space Telescope (see, for example, Holtzman et al. (2000), Han et al. (1 ...
... dwarf galaxies are the best places to study the processes of star formation. SFHs of the Local Group dwarf galaxies were studied in details from deep images, which were obtained with large ground-based telescopes and the Hubble Space Telescope (see, for example, Holtzman et al. (2000), Han et al. (1 ...
natsci9+
... The force tending to collapse the star. But there is an opposing pressure to prevent this collapse. The rapidly moving gas particles collide with each other. The frequent collisions means greater pressure, thus, making the gas expands more thereby preventing the collapse. At the core of the star, th ...
... The force tending to collapse the star. But there is an opposing pressure to prevent this collapse. The rapidly moving gas particles collide with each other. The frequent collisions means greater pressure, thus, making the gas expands more thereby preventing the collapse. At the core of the star, th ...
Siriusposter
... Theoretically, the maximum mass of a white dwarf-forming star is about 8 solar masses. Stars more massive than that explode as supernovae, creating neutron stars. However, this theoretical limit has never been backed up by observational evidence. One of our new Sirius-type binaries, HR2875 (y Pup), ...
... Theoretically, the maximum mass of a white dwarf-forming star is about 8 solar masses. Stars more massive than that explode as supernovae, creating neutron stars. However, this theoretical limit has never been backed up by observational evidence. One of our new Sirius-type binaries, HR2875 (y Pup), ...
angular size - Particle and Astroparticle Physics
... If you draw lines from your eye to each of two stars, the angle between these lines is the angular distance between these two stars ...
... If you draw lines from your eye to each of two stars, the angle between these lines is the angular distance between these two stars ...
Brightness vs. Distance
... Example: A 40 watt light bulb consumes 40 watts of electrical power, but most of this energy goes into HEAT energy. The remaining energy is converted to light. The unit used for light in this case is the “lumen”. A 40 watt bulb emits about 505 lumens of light. ...
... Example: A 40 watt light bulb consumes 40 watts of electrical power, but most of this energy goes into HEAT energy. The remaining energy is converted to light. The unit used for light in this case is the “lumen”. A 40 watt bulb emits about 505 lumens of light. ...
15-1 Notes - westscidept
... use a ________________ to separate a star’s light into a spectrum. The spectrum gives information about the ______________ and temperature of a star. When a chemical element emits ________, only some colors in the spectrum appear. These are called ____________ lines. The __________ atmosphere of a s ...
... use a ________________ to separate a star’s light into a spectrum. The spectrum gives information about the ______________ and temperature of a star. When a chemical element emits ________, only some colors in the spectrum appear. These are called ____________ lines. The __________ atmosphere of a s ...
Gemini = برج الجوزاء (May 22
... of a cluster of stars called the Hyades — the second-closest star cluster to Earth. It consists of several hundred stars that lie about 130 light-years away. • Aldebaran outshines all the other stars that outline the bull's face. But Aldebaran isn't a member of the Hyades cluster — it just lies in t ...
... of a cluster of stars called the Hyades — the second-closest star cluster to Earth. It consists of several hundred stars that lie about 130 light-years away. • Aldebaran outshines all the other stars that outline the bull's face. But Aldebaran isn't a member of the Hyades cluster — it just lies in t ...
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.