Science and the Universe
... • There is indirect evidence that much of our Galaxy is made of material that cannot be observed with presentday instruments – Thus, much of our Galaxy seems to consist of dark matter • Stars in a number of places form clusters, each containing up to hundreds of thousands of stars and taking up a vo ...
... • There is indirect evidence that much of our Galaxy is made of material that cannot be observed with presentday instruments – Thus, much of our Galaxy seems to consist of dark matter • Stars in a number of places form clusters, each containing up to hundreds of thousands of stars and taking up a vo ...
Article “What Astronomers Do” (appendix C) one per student
... refraction is slightly different, depending upon the specific wavelength of light. One big disadvantage of prism-based spectroscopes, ho wever, is that the incoming light is not linearly dispersed, meaning that the distances between the various constituent wavelengths are not equal. The blue end of ...
... refraction is slightly different, depending upon the specific wavelength of light. One big disadvantage of prism-based spectroscopes, ho wever, is that the incoming light is not linearly dispersed, meaning that the distances between the various constituent wavelengths are not equal. The blue end of ...
6 The mysterious universe
... century allowed Earth-bound astronomers to see objects in the sky with much greater precision than ever before. Observations using telescopes showed that many different types of objects in the sky could be identified. These included single or double stars, groups of stars called galaxies, clusters o ...
... century allowed Earth-bound astronomers to see objects in the sky with much greater precision than ever before. Observations using telescopes showed that many different types of objects in the sky could be identified. These included single or double stars, groups of stars called galaxies, clusters o ...
Dark Matter Search
... • Typical processes are inelastic nuclear collisions (pion production) and inverse Compton scattering. • Gamma rays tracing hadronic processes are of particular interest for neutrino observations. • Neutrino observations may be critical to learning the nature of gamma-ray sources. – The Universe is ...
... • Typical processes are inelastic nuclear collisions (pion production) and inverse Compton scattering. • Gamma rays tracing hadronic processes are of particular interest for neutrino observations. • Neutrino observations may be critical to learning the nature of gamma-ray sources. – The Universe is ...
spectral lines as distant measurement tools
... Stars to the right have red appearance, to the left they are blue. The stellar brightness is measured as “photographic magnitude”, an inverted logarithmic scale for the amount of light received from different stars if they were all placed at the same distance. The diagram is not filled randomly, but ...
... Stars to the right have red appearance, to the left they are blue. The stellar brightness is measured as “photographic magnitude”, an inverted logarithmic scale for the amount of light received from different stars if they were all placed at the same distance. The diagram is not filled randomly, but ...
The Birth and Evolution of Brown Dwarfs
... • Magnetic braking due to interaction with a disk may play a role. • Lack of efficient braking during most of dwarf’s evolution. ...
... • Magnetic braking due to interaction with a disk may play a role. • Lack of efficient braking during most of dwarf’s evolution. ...
Stars and Galaxies - La Salle Elementary Public Schools No 122
... • The sky is divided into 88 constellations. • Astronomers learn about the energy, distance, temperature, and composition of stars by studying their light. • Astronomers measure distances in space in astrological units and in light-years. They measure star brightness as apparent magnitude and as ...
... • The sky is divided into 88 constellations. • Astronomers learn about the energy, distance, temperature, and composition of stars by studying their light. • Astronomers measure distances in space in astrological units and in light-years. They measure star brightness as apparent magnitude and as ...
ESA BR-170 - ESA Science
... 1650 Bishop Ussher had famously calculated the date of creation as 4004 BC. The first to recognise the true age of the Earth was a Scottish physician called James Hutton, an amateur geologist, who, in 1790, realised from his study of rock formations that the Earth had to be much older. It was so man ...
... 1650 Bishop Ussher had famously calculated the date of creation as 4004 BC. The first to recognise the true age of the Earth was a Scottish physician called James Hutton, an amateur geologist, who, in 1790, realised from his study of rock formations that the Earth had to be much older. It was so man ...
M13 – The Great Hercules Cluster
... The quiet, peaceful nights of winter have now been replaced by summer nights full of the sounds of life. Cicadas, crickets, whippoorwills and barred owls provide a symphony for our ears while the stars of summer provide a symphony for our eyes. Go outside on a warm June night and look up at the star ...
... The quiet, peaceful nights of winter have now been replaced by summer nights full of the sounds of life. Cicadas, crickets, whippoorwills and barred owls provide a symphony for our ears while the stars of summer provide a symphony for our eyes. Go outside on a warm June night and look up at the star ...
GEOL 3045: Planetary Geology
... Formation Theories The classical & resonant KBOs probably not primordial – Inclinations & eccentricities too high – Three formation theories: Long-term effects of planetary perturbations Resonant sweeping due to planetary migration Massive scatterers resulting in impacts & gravitational per ...
... Formation Theories The classical & resonant KBOs probably not primordial – Inclinations & eccentricities too high – Three formation theories: Long-term effects of planetary perturbations Resonant sweeping due to planetary migration Massive scatterers resulting in impacts & gravitational per ...
CS3_Ch 3 - Leon County Schools
... • The sky is divided into 88 constellations. • Astronomers learn about the energy, distance, temperature, and composition of stars by studying their light. • Astronomers measure distances in space in astrological units and in light-years. They measure star brightness as apparent magnitude and as ...
... • The sky is divided into 88 constellations. • Astronomers learn about the energy, distance, temperature, and composition of stars by studying their light. • Astronomers measure distances in space in astrological units and in light-years. They measure star brightness as apparent magnitude and as ...
Slide 1 - Mr. Hill`s Science Website
... On this scale, the Milky Way Galaxy would be the size of North America. ...
... On this scale, the Milky Way Galaxy would be the size of North America. ...
Star formation, feedback and the role of SNe II and SNe Ia in the
... • Mayer et al made simulations of ram pressure stripping and tidal interaction and find a best model for Draco with V=42 km s-1 . • Mashchenko et al 2005 made N-body simulations of the formation of dwarf spheroidal galaxies and found that the best fitting models for Draco have a large range of DM ha ...
... • Mayer et al made simulations of ram pressure stripping and tidal interaction and find a best model for Draco with V=42 km s-1 . • Mashchenko et al 2005 made N-body simulations of the formation of dwarf spheroidal galaxies and found that the best fitting models for Draco have a large range of DM ha ...
Integrative Studies 410 Our Place in the Universe
... • “yard-sticks” for distance measurement • Cepheids in Andromeda Galaxies established the “extragalacticity” of this “nebula” ...
... • “yard-sticks” for distance measurement • Cepheids in Andromeda Galaxies established the “extragalacticity” of this “nebula” ...
Hubble Deep Field
The Hubble Deep Field (HDF) is an image of a small region in the constellation Ursa Major, constructed from a series of observations by the Hubble Space Telescope. It covers an area 2.5 arcminutes across, about one 24-millionth of the whole sky, which is equivalent in angular size to a 65 mm tennis ball at a distance of 100 metres. The image was assembled from 342 separate exposures taken with the Space Telescope's Wide Field and Planetary Camera 2 over ten consecutive days between December 18 and December 28, 1995.The field is so small that only a few foreground stars in the Milky Way lie within it; thus, almost all of the 3,000 objects in the image are galaxies, some of which are among the youngest and most distant known. By revealing such large numbers of very young galaxies, the HDF has become a landmark image in the study of the early universe, with the associated scientific paper having received over 900 citations by the end of 2014.Three years after the HDF observations were taken, a region in the south celestial hemisphere was imaged in a similar way and named the Hubble Deep Field South. The similarities between the two regions strengthened the belief that the universe is uniform over large scales and that the Earth occupies a typical region in the Universe (the cosmological principle). A wider but shallower survey was also made as part of the Great Observatories Origins Deep Survey. In 2004 a deeper image, known as the Hubble Ultra-Deep Field (HUDF), was constructed from a few months of light exposure. The HUDF image was at the time the most sensitive astronomical image ever made at visible wavelengths, and it remained so until the Hubble Extreme Deep Field (XDF) was released in 2012.