Violent Adolescent Planet Caught Infrared Handed
... HD172555 has strong, distinctive mid-infrared emission peaks compared to other young-forming stars with flatter emissions. The intensity of the emissions at particular wavelengths in an infrared spectrum can be used to identify the composition of dust grains and gas. Lisse and coworkers acquired an ...
... HD172555 has strong, distinctive mid-infrared emission peaks compared to other young-forming stars with flatter emissions. The intensity of the emissions at particular wavelengths in an infrared spectrum can be used to identify the composition of dust grains and gas. Lisse and coworkers acquired an ...
A Zoo of Galaxies - Portsmouth Research Portal
... 3. Physical Properties of Galaxies A galaxy is a massive collection of stars, gas and interstellar dust. To first order, the optical colour of a galaxy tells about the types of stars which live in the galaxy (ignoring the complications of dust which can redden some types of galaxies quite significan ...
... 3. Physical Properties of Galaxies A galaxy is a massive collection of stars, gas and interstellar dust. To first order, the optical colour of a galaxy tells about the types of stars which live in the galaxy (ignoring the complications of dust which can redden some types of galaxies quite significan ...
A Unique Environmental Studies Program
... Another star in the same constellation, Proxima Centauri, is actually our closest star, at 4.2 light years from earth, but it is only visible through a telescope. The Coal Sack. Close to the Southern Cross you may see a very dark patch called the "Coal Sack". This is a cloud of very dark dust or gas ...
... Another star in the same constellation, Proxima Centauri, is actually our closest star, at 4.2 light years from earth, but it is only visible through a telescope. The Coal Sack. Close to the Southern Cross you may see a very dark patch called the "Coal Sack". This is a cloud of very dark dust or gas ...
Stellar Evolution
... Slow wind from a red giant blows away cool, outer layers of the star Fast wind from hot, inner layers of the star overtakes the slow wind and excites it => Planetary Nebula ...
... Slow wind from a red giant blows away cool, outer layers of the star Fast wind from hot, inner layers of the star overtakes the slow wind and excites it => Planetary Nebula ...
Every large galaxy seems to have a supermassive black hole at its
... to account for black hole-galaxy coevolution. The standard explanation goes something like this: As a black hole gravitationally pulls in surrounding material, the gas circles the abyss faster and faster as it approaches the black hole’s event horizon — the point of no return. The material forms an ...
... to account for black hole-galaxy coevolution. The standard explanation goes something like this: As a black hole gravitationally pulls in surrounding material, the gas circles the abyss faster and faster as it approaches the black hole’s event horizon — the point of no return. The material forms an ...
Dynamics and Space Summary Notes
... A system of billions of stars with gas and dust held together by gravitational attraction. Universe A collection of galaxies. Light Year The distance light travels in one year. Satellite A small object which orbits a larger object ( like the moon orbits the Earth) Exoplanet A planet that is outside ...
... A system of billions of stars with gas and dust held together by gravitational attraction. Universe A collection of galaxies. Light Year The distance light travels in one year. Satellite A small object which orbits a larger object ( like the moon orbits the Earth) Exoplanet A planet that is outside ...
The Doppler Effect
... radio waves and X-rays. The general term for these waves is “Electromagnetic Waves”. • These waves always travel at the same speed: ...
... radio waves and X-rays. The general term for these waves is “Electromagnetic Waves”. • These waves always travel at the same speed: ...
Earth Science Notes
... Constellations are patterns made of stars in the sky Stars appear close together in the sky, however, they are actually light years from each other ...
... Constellations are patterns made of stars in the sky Stars appear close together in the sky, however, they are actually light years from each other ...
Why does Sirius twinkle?
... section: planets don't usually twinkle because they are closer and therefore bigger - they are disks of light instead of faraway points of light. The larger disks of light usually aren't distorted; however if you are looking through especially turbulent areas of our atmosphere, and even sometimes wh ...
... section: planets don't usually twinkle because they are closer and therefore bigger - they are disks of light instead of faraway points of light. The larger disks of light usually aren't distorted; however if you are looking through especially turbulent areas of our atmosphere, and even sometimes wh ...
Lecture 13 Local group chapter 4 of S+G
... which are dwarf ellipticals and irregulars with low mass; most are satellites of MW, M31 or M33 The gravitational interaction between these systems is complex but the local group is apparently bound. Major advantages – close and bright- all nearby enough that individual stars can be well measured as ...
... which are dwarf ellipticals and irregulars with low mass; most are satellites of MW, M31 or M33 The gravitational interaction between these systems is complex but the local group is apparently bound. Major advantages – close and bright- all nearby enough that individual stars can be well measured as ...
Distance Ladder
... •Typically 300 km/s or so How to to determine distances: is moving away from us at •Measure v using Doppler shift 2100 km/s? A) 1 Mly D) 484 Mly •Deduce the distance from: B) 10 Mly E) 4,840 Mly v = H0d C) 100 Mly F) 48,400 Mly ...
... •Typically 300 km/s or so How to to determine distances: is moving away from us at •Measure v using Doppler shift 2100 km/s? A) 1 Mly D) 484 Mly •Deduce the distance from: B) 10 Mly E) 4,840 Mly v = H0d C) 100 Mly F) 48,400 Mly ...
talk.wyse - Johns Hopkins University
... ΛCDM cosmology extremely successful on large scales. Galaxies are the scales on which one must see the nature of dark matter & galaxy formation astrophysics Ostriker & Steinhardt 03 ...
... ΛCDM cosmology extremely successful on large scales. Galaxies are the scales on which one must see the nature of dark matter & galaxy formation astrophysics Ostriker & Steinhardt 03 ...
Student Worksheet - Indiana University Astronomy
... The brightness of stars in IC 4665 for the wavelength regions B, V, I, J, H, and K are included in the table below. These measurements are published in the astronomical literature, as noted in the references below the table. Wavelengths are measured in nanometers (nm, 10-9 meters). Visible light has ...
... The brightness of stars in IC 4665 for the wavelength regions B, V, I, J, H, and K are included in the table below. These measurements are published in the astronomical literature, as noted in the references below the table. Wavelengths are measured in nanometers (nm, 10-9 meters). Visible light has ...
Lecture 2
... The Steidel et al LBG Sample • By 2001, over 1000 LBGs at z=3-4 had been spectroscopically confirmed by the CalTech group • Access to the Keck telescopes was crucial to this survey (sensitivity, resolution) • This sample still forms the most complete analysis of star forming galaxies at this redshi ...
... The Steidel et al LBG Sample • By 2001, over 1000 LBGs at z=3-4 had been spectroscopically confirmed by the CalTech group • Access to the Keck telescopes was crucial to this survey (sensitivity, resolution) • This sample still forms the most complete analysis of star forming galaxies at this redshi ...
Night Sky Checklist October–November
... and probably the most distant object visible in the murky skies of Acadiana. The Andromeda Galaxy is a spiral of well over 500 billion stars so far away that we can barely see it, at a distance of nearly 3 million light years. It looks like a faint fuzzy about halfway between the Great Square and Ca ...
... and probably the most distant object visible in the murky skies of Acadiana. The Andromeda Galaxy is a spiral of well over 500 billion stars so far away that we can barely see it, at a distance of nearly 3 million light years. It looks like a faint fuzzy about halfway between the Great Square and Ca ...
January 2007 - Western Nevada Astronomical Society
... to the Observatory have taken the seemingly unattainable and actually made it a part of my life. Even before it became an assignment, I gained a lot from what these observations offered me. I got to see one of our most distant neighboring planets that otherwise I would have had no access to see (Ura ...
... to the Observatory have taken the seemingly unattainable and actually made it a part of my life. Even before it became an assignment, I gained a lot from what these observations offered me. I got to see one of our most distant neighboring planets that otherwise I would have had no access to see (Ura ...
SM_Taurus - Cloudy Nights
... nebula had such a resemblance to a comet in its form and brightness, that I endeavored to find others, so that astronomers would not confuse these same nebula with comets just beginning to shine. I observed further with the proper refractors for the search of comets, and this is the purpose I had in ...
... nebula had such a resemblance to a comet in its form and brightness, that I endeavored to find others, so that astronomers would not confuse these same nebula with comets just beginning to shine. I observed further with the proper refractors for the search of comets, and this is the purpose I had in ...
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.