Galileo Galilei
... the concept of Copernicus. This contrasts with the traditional concept of Ptolemy and Aristotle that. Earth is the center of the universe in AD 1610. ...
... the concept of Copernicus. This contrasts with the traditional concept of Ptolemy and Aristotle that. Earth is the center of the universe in AD 1610. ...
Planet Formation
... Planets form from the accretion disk present around a young star. Rocky planets like the terrestrial planets of the solar system form mainly from the dust inside this disk while gas giants are mainly build out of gas, with a solid core. The formation occurs in various steps. The first step is for th ...
... Planets form from the accretion disk present around a young star. Rocky planets like the terrestrial planets of the solar system form mainly from the dust inside this disk while gas giants are mainly build out of gas, with a solid core. The formation occurs in various steps. The first step is for th ...
File
... Scientists have studied stars to discover how stars evolve. They know that stars form in a nebula when clouds of dust and gas are pulled together by gravity. Describe how this process continues for stars much more massive than the Sun. ...
... Scientists have studied stars to discover how stars evolve. They know that stars form in a nebula when clouds of dust and gas are pulled together by gravity. Describe how this process continues for stars much more massive than the Sun. ...
A-level Physics (Specification A) Teacher guide Teacher guide
... rays come from the same point on the object, ie the rays may not be parallel in reality – but are too close to being parallel as to make any difference. The angular magnification is based on the angles subtended by the object and image (clearly, if they are both at infinity, the magnification can no ...
... rays come from the same point on the object, ie the rays may not be parallel in reality – but are too close to being parallel as to make any difference. The angular magnification is based on the angles subtended by the object and image (clearly, if they are both at infinity, the magnification can no ...
tycho brahe 2 - Big History Project
... Earth on crystalline spheres and laid the foundation for our modern understanding of an evolving cosmos. Brahe’s influence extended to one of his most famous students, Johannes Kepler, who used Brahe’s detailed observational record to develop his own Laws of Planetary Motion. ...
... Earth on crystalline spheres and laid the foundation for our modern understanding of an evolving cosmos. Brahe’s influence extended to one of his most famous students, Johannes Kepler, who used Brahe’s detailed observational record to develop his own Laws of Planetary Motion. ...
Star Formation in Our Galaxy - Wiley-VCH
... the elongated shape of the whole complex and its high degree of clumpiness are generic features of such structures. Along with their gas, molecular clouds contain an admixture of small solid particles, the interstellar dust grains. These particles efficiently absorb light with wavelengths smaller th ...
... the elongated shape of the whole complex and its high degree of clumpiness are generic features of such structures. Along with their gas, molecular clouds contain an admixture of small solid particles, the interstellar dust grains. These particles efficiently absorb light with wavelengths smaller th ...
Script
... The transit method also makes it possible to study the atmosphere of the transiting planet. When the planet transits the star, light from the star passes through the upper atmosphere of the planet. By studying the high-resolution stellar spectrum carefully, one can detect elements present in the pla ...
... The transit method also makes it possible to study the atmosphere of the transiting planet. When the planet transits the star, light from the star passes through the upper atmosphere of the planet. By studying the high-resolution stellar spectrum carefully, one can detect elements present in the pla ...
The Evening Sky Map
... Conjunction – An alignment of two celestial bodies such that they present the least angular separation as viewed from Earth. Constellation – A defined area of the sky containing a star pattern. Diffuse Nebula – A cloud of gas illuminated by nearby stars. Double Star – Two stars that appear close to ...
... Conjunction – An alignment of two celestial bodies such that they present the least angular separation as viewed from Earth. Constellation – A defined area of the sky containing a star pattern. Diffuse Nebula – A cloud of gas illuminated by nearby stars. Double Star – Two stars that appear close to ...
Document
... D • A is incorrect because star A has a negative apparent magnitude, which means it is a brighter star. • B is incorrect because even though star B has a big apparent magnitude, it does not have the biggest apparent magnitude of the stars listed. • C is incorrect because stars that have smaller appa ...
... D • A is incorrect because star A has a negative apparent magnitude, which means it is a brighter star. • B is incorrect because even though star B has a big apparent magnitude, it does not have the biggest apparent magnitude of the stars listed. • C is incorrect because stars that have smaller appa ...
brochure in PDF format - MIT Haystack Observatory
... These come in the form of masers—regions of gas and dust that send out laser-like beams of microwave radiation towards Earth. Masers can trace the velocities of outflows emanating from young protostars buried in opaque molecular clouds such as those in the Orion nebula. At the end of its life our Sun ...
... These come in the form of masers—regions of gas and dust that send out laser-like beams of microwave radiation towards Earth. Masers can trace the velocities of outflows emanating from young protostars buried in opaque molecular clouds such as those in the Orion nebula. At the end of its life our Sun ...
JWST Project Report to the PMC
... 1.) Orbit that assures thermal stability and low background 2.) Orbit that assures long dwell times 3.) A stable PSF and excellent pointing 4.) Infrared sensitivity (planetary temperatures; molecules) 5.) Aperture sufficient to permit medium resolution spectroscopy These are obtained with a large ap ...
... 1.) Orbit that assures thermal stability and low background 2.) Orbit that assures long dwell times 3.) A stable PSF and excellent pointing 4.) Infrared sensitivity (planetary temperatures; molecules) 5.) Aperture sufficient to permit medium resolution spectroscopy These are obtained with a large ap ...
Brahe, Kepler
... -He made the best measurements that had yet been made in the search for stellar parallax. -He found no parallax for the stars. -He concluded : 1) either the earth was motionless at the center of the Universe 2) the stars were so far away that their parallax was too small to measure. Brahe could not ...
... -He made the best measurements that had yet been made in the search for stellar parallax. -He found no parallax for the stars. -He concluded : 1) either the earth was motionless at the center of the Universe 2) the stars were so far away that their parallax was too small to measure. Brahe could not ...
100 Binocular Deep Sky Objects
... An observing list from the logs of Ed Zarenski Sometimes we hear binocular observers ask, What is there to look at? Binoculars are useful for wide-field viewing and there just aren’t a lot of wide-field objects to view, so where should I look? My answer to those questions is, You can look at nearly ...
... An observing list from the logs of Ed Zarenski Sometimes we hear binocular observers ask, What is there to look at? Binoculars are useful for wide-field viewing and there just aren’t a lot of wide-field objects to view, so where should I look? My answer to those questions is, You can look at nearly ...
Can we account for the dust
... Origin and evolution of dust in galaxies Can we account for the dust in galaxies by stellar sources? Mikako Matsuura Origin’s fellow, Institute of Origins, University College London M.J. Barlow, G.C. Sloan, A.A. Zijlstra, D. Stock, P.A. Whitelock, P. R. Wood, ...
... Origin and evolution of dust in galaxies Can we account for the dust in galaxies by stellar sources? Mikako Matsuura Origin’s fellow, Institute of Origins, University College London M.J. Barlow, G.C. Sloan, A.A. Zijlstra, D. Stock, P.A. Whitelock, P. R. Wood, ...
Adaptive Optics Nicholas Devaney GTC project, Instituto de
... and the field of view. It is not necessary to reconstruct the turbulent layers; ‘only’ need to determine the commands for the deformable mirrors. • Tomography involves taking images with source and detector placed in different orientations. MCAO will employ multiple guide stars for simultaneous wave ...
... and the field of view. It is not necessary to reconstruct the turbulent layers; ‘only’ need to determine the commands for the deformable mirrors. • Tomography involves taking images with source and detector placed in different orientations. MCAO will employ multiple guide stars for simultaneous wave ...
The Young Exoplanet Transit Initiative (YETI)
... and transit techniques are also biased towards close-in planets, while direct imaging is biased towards wide separations. The RV technique has led to the discovery of ∼500 planet candidates, of which some 20 % are confirmed by either the astrometry or transit technique (see e.g. exoplanet.eu for upd ...
... and transit techniques are also biased towards close-in planets, while direct imaging is biased towards wide separations. The RV technique has led to the discovery of ∼500 planet candidates, of which some 20 % are confirmed by either the astrometry or transit technique (see e.g. exoplanet.eu for upd ...
1 Dark matter and dark energy comprise over 90% of the Universe
... MACHOs have been suggested as possible candidates for dark matter. Both the Spitzer Space Telescope (SST), launched in 2003 with its Infrared Array Camera (IRAC) and the Hubble Space Telescope (HST) have been used by the MACHO collaborators to search for MACHOs in the dark halo surrounding the Milky ...
... MACHOs have been suggested as possible candidates for dark matter. Both the Spitzer Space Telescope (SST), launched in 2003 with its Infrared Array Camera (IRAC) and the Hubble Space Telescope (HST) have been used by the MACHO collaborators to search for MACHOs in the dark halo surrounding the Milky ...
Characteristics of Our Galaxy
... variables (useful for judging distances), pre-main sequence stars, T-Tauri stars, Herbigharo objects, and even some A stars can be found in the arms. These stars are very metal rich and have highly circular orbits, although they comprise likely less than one percent of Milky Way stars. Young thin d ...
... variables (useful for judging distances), pre-main sequence stars, T-Tauri stars, Herbigharo objects, and even some A stars can be found in the arms. These stars are very metal rich and have highly circular orbits, although they comprise likely less than one percent of Milky Way stars. Young thin d ...
The Search for Exoplanets - Worcester Polytechnic Institute
... Almagest, but, for many centuries, no one was found to be capable of resolving the issues. With the political instability and ultimate decline of central authority in the Roman world in the 5th – 7th Centuries (the end of Late Antiquity), detailed analyses of Ptolemy’s model slowed to a crawl in the ...
... Almagest, but, for many centuries, no one was found to be capable of resolving the issues. With the political instability and ultimate decline of central authority in the Roman world in the 5th – 7th Centuries (the end of Late Antiquity), detailed analyses of Ptolemy’s model slowed to a crawl in the ...
The Scuti star XX Pyx is an ellipsoidal variable
... photometric monitoring of slowly pulsating B stars we studied thoroughly the northern target star HD 147394. We performed an end-to-end analysis, consisting of a frequency analysis, a mode identification from line-profile variations and a comparison with theoretical pulsation models. He and Si surfa ...
... photometric monitoring of slowly pulsating B stars we studied thoroughly the northern target star HD 147394. We performed an end-to-end analysis, consisting of a frequency analysis, a mode identification from line-profile variations and a comparison with theoretical pulsation models. He and Si surfa ...
Transit surveys for Earths in the habitable zones of white dwarfs
... Fig. 4.— Probability density, d2 n/(dTp d log Rp ), of detected planets vs. planet radius, Rp (log axis scale), and planet effective temperature, Tp (assuming the same albedo as Earth). The contours enclose 25%, 50%, and 75% of all detected planets; the contour levels are 29%, 53%, and 76% of the pe ...
... Fig. 4.— Probability density, d2 n/(dTp d log Rp ), of detected planets vs. planet radius, Rp (log axis scale), and planet effective temperature, Tp (assuming the same albedo as Earth). The contours enclose 25%, 50%, and 75% of all detected planets; the contour levels are 29%, 53%, and 76% of the pe ...
THREE INTRIGUER NEBULAE IN CONSTELLATION CARINA
... (Hopp & Materne 1985, Nakazawa et al. 2000) that is the third nearest galaxy cluster to us, inhabiting the eastern part of this constellation (see picture on first page). Antlia cluster, also known as ACO S 0636, is centered at R.A. 10h 30m 01s Dec. –35° 19´ 35”. With a galactic latitude of 19 degr ...
... (Hopp & Materne 1985, Nakazawa et al. 2000) that is the third nearest galaxy cluster to us, inhabiting the eastern part of this constellation (see picture on first page). Antlia cluster, also known as ACO S 0636, is centered at R.A. 10h 30m 01s Dec. –35° 19´ 35”. With a galactic latitude of 19 degr ...
Spitzer Space Telescope
The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003. It is the fourth and final of the NASA Great Observatories program.The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009. Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments are no longer usable. However, the two shortest-wavelength modules of the IRAC camera are still operable with the same sensitivity as before the cryogen was exhausted, and will continue to be used in the Spitzer Warm Mission. All Spitzer data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA).In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named after famous deceased astronomers by a board of scientists, the new name for SIRTF was obtained from a contest open to the general public.The contest led to the telescope being named in honor of astronomer Lyman Spitzer, who had promoted the concept of space telescopes in the 1940s. Spitzer wrote a 1946 report for RAND Corporation describing the advantages of an extraterrestrial observatory and how it could be realized with available or upcoming technology. He has been cited for his pioneering contributions to rocketry and astronomy, as well as ""his vision and leadership in articulating the advantages and benefits to be realized from the Space Telescope Program.""The US$800 million Spitzer was launched from Cape Canaveral Air Force Station, on a Delta II 7920H ELV rocket, Monday, 25 August 2003 at 13:35:39 UTC-5 (EDT).It follows a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical unit per year (a so-called ""earth-trailing"" orbit). The primary mirror is 85 centimeters (33 in) in diameter, f/12, made of beryllium and is cooled to 5.5 K (−449.77 °F). The satellite contains three instruments that allow it to perform astronomical imaging and photometry from 3 to 180 micrometers, spectroscopy from 5 to 40 micrometers, and spectrophotometry from 5 to 100 micrometers.