normal and active - FirstLight Astro
... ✴ by 1908, astronomers found 15000 objects; what were they all? ✴ either nearby luminous clouds or faraway systems of pooploads of stars or both ...
... ✴ by 1908, astronomers found 15000 objects; what were they all? ✴ either nearby luminous clouds or faraway systems of pooploads of stars or both ...
bode elert johann
... Astronomers are familiar with star designations such as 19 Orionis, going back to John Flamsteed (1646–1719), the first Astronomer Royal at Greenwich. This star is better known as Rigel or β Orionis. Though star names are old, Greek letters were not introduced until 1603, by Johann Bayer in his famo ...
... Astronomers are familiar with star designations such as 19 Orionis, going back to John Flamsteed (1646–1719), the first Astronomer Royal at Greenwich. This star is better known as Rigel or β Orionis. Though star names are old, Greek letters were not introduced until 1603, by Johann Bayer in his famo ...
Halley`s Comet Strikes Back!
... {{Non-free image data |Description = The nucleus of Halley's Comet, taken by the Giotto probe in 1986 |Source = http://www.esa.int/esaSC/120392_index_1_m.html#subhead6 |Portion = All |Low_resolution = Yes. 292x300 pix (free of charge for educational or ...
... {{Non-free image data |Description = The nucleus of Halley's Comet, taken by the Giotto probe in 1986 |Source = http://www.esa.int/esaSC/120392_index_1_m.html#subhead6 |Portion = All |Low_resolution = Yes. 292x300 pix (free of charge for educational or ...
Conference Abstract Booklet here.
... Maria Ida Moretti Ming Yang We aim to construct an exceptionally deep catalog of variable objects in selected Galactic and extragalactic fields visited multiple times by the Hubble Space Telescope with the same instrument/filter combination. While some of these fields were searched for specific type ...
... Maria Ida Moretti Ming Yang We aim to construct an exceptionally deep catalog of variable objects in selected Galactic and extragalactic fields visited multiple times by the Hubble Space Telescope with the same instrument/filter combination. While some of these fields were searched for specific type ...
Mn, Cu, and Zn abundances in barium stars and their correlations
... Barium stars are optimal sites for studying the correlations between the neutron-capture elements and other species that may be depleted or enhanced, because they act as neutron seeds or poisons during the operation of the s-process. These data are necessary to help constrain the modeling of the neu ...
... Barium stars are optimal sites for studying the correlations between the neutron-capture elements and other species that may be depleted or enhanced, because they act as neutron seeds or poisons during the operation of the s-process. These data are necessary to help constrain the modeling of the neu ...
chapter 15 navigational astronomy
... The principal bodies orbiting the Sun are called planets. Nine principal planets are known: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Of these, only four are commonly used for celestial navigation: Venus, Mars, Jupiter, and Saturn. Except for Pluto, the orbits of the ...
... The principal bodies orbiting the Sun are called planets. Nine principal planets are known: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Of these, only four are commonly used for celestial navigation: Venus, Mars, Jupiter, and Saturn. Except for Pluto, the orbits of the ...
Sidereus Nuncius (Print Translation)
... I shall first mention briefly, and then I shall review the history of the observations made by me. About ten months ago a rumor came to our ears that a spyglass had been made by a certain Dutchman23 by means of which visible objects, although far removed from the eye of the observer, were distinctl ...
... I shall first mention briefly, and then I shall review the history of the observations made by me. About ten months ago a rumor came to our ears that a spyglass had been made by a certain Dutchman23 by means of which visible objects, although far removed from the eye of the observer, were distinctl ...
Navigation: The Mariner`s Quadrant
... Navigation: The Mariner's Quadrant The quadrant is a very simple tool that allows the user to determine his or her latitude by measuring the altitude of a heavenly body. When used in celestial navigation or astronomy, altitude means the angle of elevation between the horizon and celestial bodies lik ...
... Navigation: The Mariner's Quadrant The quadrant is a very simple tool that allows the user to determine his or her latitude by measuring the altitude of a heavenly body. When used in celestial navigation or astronomy, altitude means the angle of elevation between the horizon and celestial bodies lik ...
Comets, historical records and vedic literature
... of Atharvaveda have been dated to about 1150 BC because of their first direct mention of metal iron (Witzel, 1995). Ketus (in plural), meaning rays of light or fire-smoke combine, have also been discussed in Atharvaveda, and it is very likely that they represented comets or meteors (Kochhar, 2010). ...
... of Atharvaveda have been dated to about 1150 BC because of their first direct mention of metal iron (Witzel, 1995). Ketus (in plural), meaning rays of light or fire-smoke combine, have also been discussed in Atharvaveda, and it is very likely that they represented comets or meteors (Kochhar, 2010). ...
Classification of Variable Stars
... Bluish Blue-white White Yellow-white Yellowish Orange Reddish Red-infrared infrared infrared infrared ...
... Bluish Blue-white White Yellow-white Yellowish Orange Reddish Red-infrared infrared infrared infrared ...
Asteroid Rotation Periods
... issue and chance played an important role –however we can expect asteroid 2 Pallas to be larger than 219 Alice and that larger than 4.179 Toutatis). Although the best way to study an asteroid is by in situ measurements –ie by a spacecraft, this is very expensive and therefore only a small number of ...
... issue and chance played an important role –however we can expect asteroid 2 Pallas to be larger than 219 Alice and that larger than 4.179 Toutatis). Although the best way to study an asteroid is by in situ measurements –ie by a spacecraft, this is very expensive and therefore only a small number of ...
Starburst Galaxies - Beck-Shop
... by the arms. The reason why the arms stand out so sharply from the rest of the disk is that they contain numerous star-forming regions. In those regions the massive hot young stars are extremely bright and outshine the far more numerous less massive stars. Few starforming regions are to be found in ...
... by the arms. The reason why the arms stand out so sharply from the rest of the disk is that they contain numerous star-forming regions. In those regions the massive hot young stars are extremely bright and outshine the far more numerous less massive stars. Few starforming regions are to be found in ...
Betelgeuse - TeacherWeb
... bar?q=does+betelgeuse+have+any+planets+orbiting+it&page=1&qsrc=0&dm=all&ab=0&title=Betelgeuse%3A+The+ incredible+shrinking+star%3F+-+space+-+10+June+2009+-&u=http%3A%2F%2Fwww.newscientist.com%2Farticle%2 Fdn17282-betelgeuse-the-incredible-shrinking-star.html&sg=Tg5Jp0P9HJP34hrORVjtKiFjVQQx%2FdKgrwDF ...
... bar?q=does+betelgeuse+have+any+planets+orbiting+it&page=1&qsrc=0&dm=all&ab=0&title=Betelgeuse%3A+The+ incredible+shrinking+star%3F+-+space+-+10+June+2009+-&u=http%3A%2F%2Fwww.newscientist.com%2Farticle%2 Fdn17282-betelgeuse-the-incredible-shrinking-star.html&sg=Tg5Jp0P9HJP34hrORVjtKiFjVQQx%2FdKgrwDF ...
Cycles of magnetic activity in solar-type stars. The place of the Sun
... on the Hertzsprung-Russell diagram. Stars which are close to the ZAMS in Figure 1 have the lowest age among all other stars: log(Age/yr) is about 8 - 8.5. The older the star is, the farther it is from the ZAMS. Ages of stars in the Figure 1 varies from 108 to 1010 years. We can also see that some st ...
... on the Hertzsprung-Russell diagram. Stars which are close to the ZAMS in Figure 1 have the lowest age among all other stars: log(Age/yr) is about 8 - 8.5. The older the star is, the farther it is from the ZAMS. Ages of stars in the Figure 1 varies from 108 to 1010 years. We can also see that some st ...
Chap 16: Galaxies
... Starburst galaxies contain many young stars and recent supernovae, and are often very rich in gas and dust; bright in infrared: ultraluminous infrared galaxies ...
... Starburst galaxies contain many young stars and recent supernovae, and are often very rich in gas and dust; bright in infrared: ultraluminous infrared galaxies ...
Fast Auto-Focus Method and Software for CCD-based
... far from Best Focus (user selected inside or outside of Best Focus) 2. A full frame 3x3 binned image is taken with a minimal exposure time 3. The brightest star is found, the position determined and the HFD measured 4. The target star is sub-framed and a second exposure taken (download time is minim ...
... far from Best Focus (user selected inside or outside of Best Focus) 2. A full frame 3x3 binned image is taken with a minimal exposure time 3. The brightest star is found, the position determined and the HFD measured 4. The target star is sub-framed and a second exposure taken (download time is minim ...
Fast Auto-Focus Method and Software for CCD
... far from Best Focus (user selected inside or outside of Best Focus) 2. A full frame 3x3 binned image is taken with a minimal exposure time 3. The brightest star is found, the position determined and the HFD measured 4. The target star is sub-framed and a second exposure taken (download time is minim ...
... far from Best Focus (user selected inside or outside of Best Focus) 2. A full frame 3x3 binned image is taken with a minimal exposure time 3. The brightest star is found, the position determined and the HFD measured 4. The target star is sub-framed and a second exposure taken (download time is minim ...
disappearance of comet c/2010 x1 (elenin): gone with a whimper
... of amateur observers reported sightings of the comet (Gonzalez et al. 2011). Visual magnitudes of active comets, especially when reported by different observers using different instruments, are very difficult to interpret and so we have not used them in the present analysis. However, the amateur obse ...
... of amateur observers reported sightings of the comet (Gonzalez et al. 2011). Visual magnitudes of active comets, especially when reported by different observers using different instruments, are very difficult to interpret and so we have not used them in the present analysis. However, the amateur obse ...
Pulsed Accretion in the Young Binary &
... Type I variations are periodic in VRI bands and are caused by rotational modulation of the star with an asymmetric distribution of cold spots (due to strong magnetic fields) on the stellar surface. These are thought to be analogous to sunspots, although they can cover up to 40% of the stellar surfac ...
... Type I variations are periodic in VRI bands and are caused by rotational modulation of the star with an asymmetric distribution of cold spots (due to strong magnetic fields) on the stellar surface. These are thought to be analogous to sunspots, although they can cover up to 40% of the stellar surfac ...
Galaxies
... __________ is an irregular galaxy that is believed to have collided with the Milky Way and is expected to merge with the Milky Way in the future. a. The Andromeda galaxy b. The Small Magellanic Cloud c. M87 d. The Virgo cluster e. The Whirlpool galaxy The rotation curve of a galaxy can be used to de ...
... __________ is an irregular galaxy that is believed to have collided with the Milky Way and is expected to merge with the Milky Way in the future. a. The Andromeda galaxy b. The Small Magellanic Cloud c. M87 d. The Virgo cluster e. The Whirlpool galaxy The rotation curve of a galaxy can be used to de ...
Abstracts - Physics of Evolved Stars 2015
... and planetary-nebula stages. AGB stars lose most of their stellar envelope in the form of a gaseous and dusty stellar wind. This wind eventually grows to such high mass-loss rates that the central star becomes entirely enshrouded by a dense, dusty superwind. Before reaching such high massloss rates, ...
... and planetary-nebula stages. AGB stars lose most of their stellar envelope in the form of a gaseous and dusty stellar wind. This wind eventually grows to such high mass-loss rates that the central star becomes entirely enshrouded by a dense, dusty superwind. Before reaching such high massloss rates, ...
Boötes
Boötes /boʊˈoʊtiːz/ is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from the Greek Βοώτης, Boōtēs, meaning herdsman or plowman (literally, ox-driver; from βοῦς bous “cow”). The ""ö"" in the name is a diaeresis, not an umlaut, meaning that each 'o' is to be pronounced separately.One of the 48 constellations described by the 2nd century astronomer Ptolemy, Boötes is now one of the 88 modern constellations. It contains the fourth brightest star in the night sky, the orange-hued Arcturus. Boötes is home to many other bright stars, including eight above the fourth magnitude and an additional 21 above the fifth magnitude, making a total of 29 stars easily visible to the naked eye.