THE LAS CAMPANAS INFRARED SURVEY CAMERA S. E. Persson
... Recent rapid improvement in the quality and size of nearinfrared imaging array detectors has led to great advances in many areas of astronomy, and the time is opportune to apply them to ambitious surveys. The camera described in this paper has been developed for the purpose of conducting deep (Ks ...
... Recent rapid improvement in the quality and size of nearinfrared imaging array detectors has led to great advances in many areas of astronomy, and the time is opportune to apply them to ambitious surveys. The camera described in this paper has been developed for the purpose of conducting deep (Ks ...
Combined Earth-/Star-Sensor for Attitude and Orbit Determination of
... Further topics were covered in cooperation with Astrium-Optical Instruments and EADS-CRC: • Simulation of the Point-Spread-Function (PSF) for simple optics, • Star-center determination (Centroiding), • Star-tracking without need for Star-identification for high angular rates, • Earth-horizon and Ear ...
... Further topics were covered in cooperation with Astrium-Optical Instruments and EADS-CRC: • Simulation of the Point-Spread-Function (PSF) for simple optics, • Star-center determination (Centroiding), • Star-tracking without need for Star-identification for high angular rates, • Earth-horizon and Ear ...
No. 6
... Figure 1. A 9x50 right angle finder with a slide adapter. The advantage of a right angle finder is that you don't have to crouch down to point to stars at high elevation angles. In addition the use of a larger aperture finder permits much easier acquisition of stars. There are cross hairs in this de ...
... Figure 1. A 9x50 right angle finder with a slide adapter. The advantage of a right angle finder is that you don't have to crouch down to point to stars at high elevation angles. In addition the use of a larger aperture finder permits much easier acquisition of stars. There are cross hairs in this de ...
Astronomy 112 - Solar Physics and Space Weather
... obliterate a small crater in about a million years and a large crater in about 100 million years. Craters are also effected by a thick lava flow which can totally alter surface features in a very short period of time. A careful study of the number and size of craters gives us a way to estimate the a ...
... obliterate a small crater in about a million years and a large crater in about 100 million years. Craters are also effected by a thick lava flow which can totally alter surface features in a very short period of time. A careful study of the number and size of craters gives us a way to estimate the a ...
P1 topic 3 - WordPress.com
... (iii) One theory of the origin of the Universe predicted that there should be cosmic background radiation with a wavelength of about 1 mm. Explain why scientists had to wait until the development of space flight before they could study this radiation in detail. ...
... (iii) One theory of the origin of the Universe predicted that there should be cosmic background radiation with a wavelength of about 1 mm. Explain why scientists had to wait until the development of space flight before they could study this radiation in detail. ...
The Sun
... The true value is a bit higher because the mean free path is smaller in the center of the Sun. For comparison, the light-travel time across a solar radius is ...
... The true value is a bit higher because the mean free path is smaller in the center of the Sun. For comparison, the light-travel time across a solar radius is ...
THE MONTHLY SKY GUIDE, SIXTH EDITION
... streak of light dash across the sky like a cosmic laser beam, lasting no more than a second or so. This is a meteor, popularly termed a shooting star. Do not misidentify shooting stars with satellites or high-flying aeroplanes, which look like moving stars but drift at a more leisurely pace. Despite ...
... streak of light dash across the sky like a cosmic laser beam, lasting no more than a second or so. This is a meteor, popularly termed a shooting star. Do not misidentify shooting stars with satellites or high-flying aeroplanes, which look like moving stars but drift at a more leisurely pace. Despite ...
1 - Piscataway High School
... but stars less massive than about 0.4 solar mass never get hot enough to ignite helium. Stars more massive than 3 solar masses ignite helium before their contracting cores become degenerate. Whether a star experiences a helium flash or not, the ignition of helium in the core changes the structure of ...
... but stars less massive than about 0.4 solar mass never get hot enough to ignite helium. Stars more massive than 3 solar masses ignite helium before their contracting cores become degenerate. Whether a star experiences a helium flash or not, the ignition of helium in the core changes the structure of ...
Kepler-423b: a half-Jupiter mass planet transiting a very old solar
... a S/N of about 60 per pixel at 5500 Å. Two independent analyses were performed. The first method compares the co-added FIES spectrum with a grid of theoretical models from Castelli & Kurucz (2004), Coelho et al. (2005), and Gustafsson et al. (2008), using spectral features that are sensitive to diff ...
... a S/N of about 60 per pixel at 5500 Å. Two independent analyses were performed. The first method compares the co-added FIES spectrum with a grid of theoretical models from Castelli & Kurucz (2004), Coelho et al. (2005), and Gustafsson et al. (2008), using spectral features that are sensitive to diff ...
Star formation rates from young-star counts and the structure of the
... A different picture emerges from the analysis presented by Gutermuth et al. (2011). These authors present scatter diagrams of surface density of YSOs versus gas (from extinction) for eight molecular clouds within 1 kpc from the Sun. They find a steep power-law correlation (with indices between 1.4 ...
... A different picture emerges from the analysis presented by Gutermuth et al. (2011). These authors present scatter diagrams of surface density of YSOs versus gas (from extinction) for eight molecular clouds within 1 kpc from the Sun. They find a steep power-law correlation (with indices between 1.4 ...
Ancient Egyptian Astronomy
... Early Indian Astronomers and their Discoveries Many of the earliest Indian astronomers made discoveries that were far ahead of their western counterparts. Aryabhatta - was born in 476 A.D., and is widely recognized as the father of Indian astronomy. When he was about 25 years old, he presented astro ...
... Early Indian Astronomers and their Discoveries Many of the earliest Indian astronomers made discoveries that were far ahead of their western counterparts. Aryabhatta - was born in 476 A.D., and is widely recognized as the father of Indian astronomy. When he was about 25 years old, he presented astro ...
A Bayesian method for the detection of planetary transits
... (Rosenblatt et al. 1971; Borucki & Summers 1984). In fact, this is not an actual detection method but rather a discriminative test. Moreover it needs a larger photometric precision than currently available. In this paper a new method is described for the detection of planetary transit building a sim ...
... (Rosenblatt et al. 1971; Borucki & Summers 1984). In fact, this is not an actual detection method but rather a discriminative test. Moreover it needs a larger photometric precision than currently available. In this paper a new method is described for the detection of planetary transit building a sim ...
Activity : Milky Way
... Link the factors a) that star forming regions require a cause for compression to increased densities and b) that the arms do not share the stellar rotation about the galactic centre. Could the arms themselves be providing the increased density? Are they ‘density waves’ moving through a uniform gas, ...
... Link the factors a) that star forming regions require a cause for compression to increased densities and b) that the arms do not share the stellar rotation about the galactic centre. Could the arms themselves be providing the increased density? Are they ‘density waves’ moving through a uniform gas, ...
Sky-High 2015 - Irish Astronomical Society
... a half metres in front of your eye, it would just about cover the Moon's disk. The Sun is nearly 1.4 million km in diameter, the Moon is 3476 km and the one Euro coin is just over two centimetres in size. Yet they appear nearly equal. This is because they all seem to take up the same amount of the s ...
... a half metres in front of your eye, it would just about cover the Moon's disk. The Sun is nearly 1.4 million km in diameter, the Moon is 3476 km and the one Euro coin is just over two centimetres in size. Yet they appear nearly equal. This is because they all seem to take up the same amount of the s ...
Survey of Astrophysics A110 The Milky Way Galaxy
... There are two reasons why spiral structure may be present in a galaxy. – 1. Supernovae explosions will sweep up gas into elongated string-like structures where new stars will form. The rotation of the galaxy, which can be observed by studying stellar proper motions and Doppler shifts, then orders th ...
... There are two reasons why spiral structure may be present in a galaxy. – 1. Supernovae explosions will sweep up gas into elongated string-like structures where new stars will form. The rotation of the galaxy, which can be observed by studying stellar proper motions and Doppler shifts, then orders th ...
Spectroscopy: Unlocking the Secrets of Star Light
... The slit on the spectrograph limits the light entering the spectrograph so that it acts as a point source of light from a larger image. This allows an astronomer to take a number of spectra from different regions of an extended source such as a galaxy or of s specific star in the telescope's field o ...
... The slit on the spectrograph limits the light entering the spectrograph so that it acts as a point source of light from a larger image. This allows an astronomer to take a number of spectra from different regions of an extended source such as a galaxy or of s specific star in the telescope's field o ...
Spectroscopy: Unlocking the Secrets of Star Light
... The slit on the spectrograph limits the light entering the spectrograph so that it acts as a point source of light from a larger image. This allows an astronomer to take a number of spectra from different regions of an extended source such as a galaxy or of s specific star in the telescope's field o ...
... The slit on the spectrograph limits the light entering the spectrograph so that it acts as a point source of light from a larger image. This allows an astronomer to take a number of spectra from different regions of an extended source such as a galaxy or of s specific star in the telescope's field o ...
Option D – Astrophysics
... The Sun and all the objects orbiting it are collectively known as the solar system. Our Sun is a star and it is very similar to billions of other stars in the universe. It has many objects orbiting around it that are held in their orbits by gravity. The solar system is an example of a planetary syst ...
... The Sun and all the objects orbiting it are collectively known as the solar system. Our Sun is a star and it is very similar to billions of other stars in the universe. It has many objects orbiting around it that are held in their orbits by gravity. The solar system is an example of a planetary syst ...
The roAp star α Circinus as seen by BRITE
... multi-colour photometry of α Cir in the Walraven system. The goal was pulsation mode identification (attempted also by Kurtz & Balona 1984) based on frequency multiplets and amplitude changes. The first simultaneous time-resolved photometry and spectroscopy of α Cir were obtained at ESO by Schneider ...
... multi-colour photometry of α Cir in the Walraven system. The goal was pulsation mode identification (attempted also by Kurtz & Balona 1984) based on frequency multiplets and amplitude changes. The first simultaneous time-resolved photometry and spectroscopy of α Cir were obtained at ESO by Schneider ...
Stellar evolution - Statistical Physics Group
... (vi) composition of surface layers. If a star is a partner in a binary system whose distance is known and whose apparent orbital elements can be observed, it is possible to find a value for (vii) stellar mass. If rather less information is available it may be possible to find one relation between th ...
... (vi) composition of surface layers. If a star is a partner in a binary system whose distance is known and whose apparent orbital elements can be observed, it is possible to find a value for (vii) stellar mass. If rather less information is available it may be possible to find one relation between th ...
THREE INTRIGUER NEBULAE IN CONSTELLATION CARINA
... 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 degrees it is not too far from the Zone of Avoidance (ZOA), a narrow band on the sky in which very few galaxies ...
... 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 degrees it is not too far from the Zone of Avoidance (ZOA), a narrow band on the sky in which very few galaxies ...
Testing relativity from the 1919 eclipse
... great a shift in stellar positions—about 1.75” at the limb of the Sun—as does the Newtonian theory.5 As early as 1913, Einstein wrote to leading astronomers, trying to interest them in making a measurement of the effect he had predicted. Stars are not normally visible close to the Sun, though, a pro ...
... great a shift in stellar positions—about 1.75” at the limb of the Sun—as does the Newtonian theory.5 As early as 1913, Einstein wrote to leading astronomers, trying to interest them in making a measurement of the effect he had predicted. Stars are not normally visible close to the Sun, though, a pro ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.