The Circumstellar Medium of Massive Stars in Motion
... Massive stars are the main drivers of the evolution of the gaseous component of galaxies. They emit huge quantities of far-ultraviolet photons that ionise and heat surrounding gas; their strong winds drive shocks and gas flows; and their final explosions as supernovae or gamma-ray bursts generate po ...
... Massive stars are the main drivers of the evolution of the gaseous component of galaxies. They emit huge quantities of far-ultraviolet photons that ionise and heat surrounding gas; their strong winds drive shocks and gas flows; and their final explosions as supernovae or gamma-ray bursts generate po ...
European Extremely Large Telescope (E-ELT) - DESY
... has recently begun to accelerate, presumably driven by some form of dark energy, was arguably one of the most important as well as mysterious scientific breakthroughs of the past decade. The E-ELT will help us to elucidate the nature of dark energy by helping to discover and identify distant type Ia ...
... has recently begun to accelerate, presumably driven by some form of dark energy, was arguably one of the most important as well as mysterious scientific breakthroughs of the past decade. The E-ELT will help us to elucidate the nature of dark energy by helping to discover and identify distant type Ia ...
Astrophysics Lab “A”
... been seen from its mass-loss rate, which is significantly lower than the values mentioned above. Ṁ (sun): approx. 10−14 M⊙ /yr (corresponding to a “Baltic Sea mass” per year or a “Great Salt Lake mass” per day). ...
... been seen from its mass-loss rate, which is significantly lower than the values mentioned above. Ṁ (sun): approx. 10−14 M⊙ /yr (corresponding to a “Baltic Sea mass” per year or a “Great Salt Lake mass” per day). ...
Document
... • It contains over 100 billion stars. • M100 is so far away that we see it as it looked over 50 million years ago. • Discovered in 1781 in the constellation Comae Berenices, it was one of the "nebular objects" believed to be no more distant than the stars. Only recently have we been able to distingu ...
... • It contains over 100 billion stars. • M100 is so far away that we see it as it looked over 50 million years ago. • Discovered in 1781 in the constellation Comae Berenices, it was one of the "nebular objects" believed to be no more distant than the stars. Only recently have we been able to distingu ...
The Milky Way Galaxy (ch. 23)
... formation and evolution of our galaxy (Fig.23.14)—halo forms first in nearly spherical shape, rest of gas collapsed to disk which has formed stars continuously since that time. (Think about how above properties suggest this.) More recently it was discovered that our Galaxy has a weak but detectable ...
... formation and evolution of our galaxy (Fig.23.14)—halo forms first in nearly spherical shape, rest of gas collapsed to disk which has formed stars continuously since that time. (Think about how above properties suggest this.) More recently it was discovered that our Galaxy has a weak but detectable ...
Science Olympiad 2008 Reach for the Stars Division B
... most determines how they will differ? A) location where they are formed B) time they are formed C) luminosity they are formed with D) mass they are formed with E) color they are formed with 111. The spectral sequence sorts stars according to: (choose as many as apply) A) mass B) surface temperature ...
... most determines how they will differ? A) location where they are formed B) time they are formed C) luminosity they are formed with D) mass they are formed with E) color they are formed with 111. The spectral sequence sorts stars according to: (choose as many as apply) A) mass B) surface temperature ...
Stellar Physics
... For electromagnetic radiation, flux is defined as the rate of flow of energy passing through unit area. (Or average power per unit area.) For visible light this is called brightness and is in effect the apparent brightness at the surface of the star. From the Stefan-Boltzmann law for a black-body: F ...
... For electromagnetic radiation, flux is defined as the rate of flow of energy passing through unit area. (Or average power per unit area.) For visible light this is called brightness and is in effect the apparent brightness at the surface of the star. From the Stefan-Boltzmann law for a black-body: F ...
Stellar Continua
... • Compute bolometric corrections (BC) to correct measured flux (usually in the V band) to the total flux • BC is usually defined in magnitude units: ...
... • Compute bolometric corrections (BC) to correct measured flux (usually in the V band) to the total flux • BC is usually defined in magnitude units: ...
proposed october viewing list
... OBJECT DESCRIPTIONS M11 Known as the Wild Duck cluster, this open cluster in the constellation Scutum, (SKEW-tum) is seen best with the 4” refractor at low magnification. It contains more than 2900 stars and is estimated to be about 250 million years old. M11 is receding from us at a speed of 27 km ...
... OBJECT DESCRIPTIONS M11 Known as the Wild Duck cluster, this open cluster in the constellation Scutum, (SKEW-tum) is seen best with the 4” refractor at low magnification. It contains more than 2900 stars and is estimated to be about 250 million years old. M11 is receding from us at a speed of 27 km ...
Space Unit notes
... Satellites are designed to perform one of four functions: Communication - provide ‘wireless’ technologies for a wide range of applications. Digital signals have resulted in clearer communications and more users. Observation and Research - A geosynchronous orbit is one that enables a satellite to re ...
... Satellites are designed to perform one of four functions: Communication - provide ‘wireless’ technologies for a wide range of applications. Digital signals have resulted in clearer communications and more users. Observation and Research - A geosynchronous orbit is one that enables a satellite to re ...
Abrams Planetarium Galileo & the Telescope—Sept 12 • Sky preview 2008-2009
... fixed stars, the Milky Way, nebulous stars, but especially about the four planets flying around the star of Jupiter at unequal intervals and periods with wonderful swiftness; which unknown by anyone until this day, the first author detected recently and decided to name Midicean Stars. Venice ...
... fixed stars, the Milky Way, nebulous stars, but especially about the four planets flying around the star of Jupiter at unequal intervals and periods with wonderful swiftness; which unknown by anyone until this day, the first author detected recently and decided to name Midicean Stars. Venice ...
ch 31, stars
... • A spectroscope uses a prism or diffraction grating to disperse the light into its component wavelengths. • The separated wavelengths are called the spectrum of the star. • The spectrum can determine a star’s chemical composition, its surface temperature, and whether it is moving away from or towar ...
... • A spectroscope uses a prism or diffraction grating to disperse the light into its component wavelengths. • The separated wavelengths are called the spectrum of the star. • The spectrum can determine a star’s chemical composition, its surface temperature, and whether it is moving away from or towar ...
CONSTELLATION TELESCOPIUM THE TELESCOPE Telescopium
... Telescopium constellation lies in the southern sky, to the south of Sagittarius and Corona Australis. It represents a telescope The constellation culminates on the 13th of August, at the same time as Wega (Vega) of the Lyre (Lyra). Telescopium is the 57th constellation in size, occupying an area of ...
... Telescopium constellation lies in the southern sky, to the south of Sagittarius and Corona Australis. It represents a telescope The constellation culminates on the 13th of August, at the same time as Wega (Vega) of the Lyre (Lyra). Telescopium is the 57th constellation in size, occupying an area of ...
a MS Word version.
... approximate current best value for Hubble's constant? Given this constant, how is the Hubble relation used to determine the distance to far galaxies? ...
... approximate current best value for Hubble's constant? Given this constant, how is the Hubble relation used to determine the distance to far galaxies? ...
Part 2 - Aryabhat
... constellations that formed the ancient constellation of Argo Navis, the ship Jason and the Argonauts sailed in to search for the Golden Fleece. Two other constellations form the Sail (Vela) and Stern (Puppis). In modern odysseys, spacecraft such as Voyager 2 used the light from Canopus to orient the ...
... constellations that formed the ancient constellation of Argo Navis, the ship Jason and the Argonauts sailed in to search for the Golden Fleece. Two other constellations form the Sail (Vela) and Stern (Puppis). In modern odysseys, spacecraft such as Voyager 2 used the light from Canopus to orient the ...
Penentuan Jarak dalam Astronomi II
... Supernovae explosion events are very rare and spectacular phenomena on the heavens Last two SNe in our Milky Way Galaxy: SN 1572 (Tycho Brage’s supernova Ia (?) in the Cassiopeia constellation) achieved -4m at the ...
... Supernovae explosion events are very rare and spectacular phenomena on the heavens Last two SNe in our Milky Way Galaxy: SN 1572 (Tycho Brage’s supernova Ia (?) in the Cassiopeia constellation) achieved -4m at the ...
Astronomy Astrophysics Circumstellar emission in Be/X-ray binaries of the Magellanic
... higher for Be/X-ray binaries than for isolated Be stars with the same equivalent width EW(Hα ), implying significant differences in the physical properties of their circumstellar envelopes. The distance to Be/X-ray binaries (with non-shell Be star companions) can only be correctly estimated by taking ...
... higher for Be/X-ray binaries than for isolated Be stars with the same equivalent width EW(Hα ), implying significant differences in the physical properties of their circumstellar envelopes. The distance to Be/X-ray binaries (with non-shell Be star companions) can only be correctly estimated by taking ...
ppt document
... The constellations that are found on the path of the sun (the ecliptic) are called the constellations of the zodiac. During the year the sun moves along the ecliptic spending approximately one month in each of the 12 constellations of the zodiac. The sun moves from West to East through these constel ...
... The constellations that are found on the path of the sun (the ecliptic) are called the constellations of the zodiac. During the year the sun moves along the ecliptic spending approximately one month in each of the 12 constellations of the zodiac. The sun moves from West to East through these constel ...
same
... reasons why we use right ascension and declination (i.e., exact coordinates) as you will find out. Actually, professional astronomers only use the exact coordinates. The stars that make up the constellations are not actually physically associated but are just patterns that resemble or honor animals, ...
... reasons why we use right ascension and declination (i.e., exact coordinates) as you will find out. Actually, professional astronomers only use the exact coordinates. The stars that make up the constellations are not actually physically associated but are just patterns that resemble or honor animals, ...
Lecture notes on Coordinte systems
... Astronomy 350: Lecture 1 - Positional Astronomy • Stars appear as bright points on a dark spherical surface - no such celestial sphere really exists but its useful to have this in mind - a scientific model. • Earth or the observer is at the center of the Celestial sphere. • Dont need to know how far ...
... Astronomy 350: Lecture 1 - Positional Astronomy • Stars appear as bright points on a dark spherical surface - no such celestial sphere really exists but its useful to have this in mind - a scientific model. • Earth or the observer is at the center of the Celestial sphere. • Dont need to know how far ...
uniview glossary - DMNS Galaxy Guide Portal
... Saturn was named for the Roman god of agriculture and lies 885 million miles from the Sun, (9.6 AU). Saturn takes 29.5 years to orbit, but only 10.7 hours to rotate (day). Its diameter is 75,000 miles, making it the second largest planet. Its mass is 95 times that of Earth. It is the second of the f ...
... Saturn was named for the Roman god of agriculture and lies 885 million miles from the Sun, (9.6 AU). Saturn takes 29.5 years to orbit, but only 10.7 hours to rotate (day). Its diameter is 75,000 miles, making it the second largest planet. Its mass is 95 times that of Earth. It is the second of the f ...
S8.4 Can Photometrical Data Help To Maintain a Catalogue of
... an image series. Stars from the field, in which the observed object was situated, were used as reference stars. Analysis of these data demonstrated, that errors during the image calibration often exceed the amplitude of the observed differences of object brightness. Therefore, in the posterior obser ...
... an image series. Stars from the field, in which the observed object was situated, were used as reference stars. Analysis of these data demonstrated, that errors during the image calibration often exceed the amplitude of the observed differences of object brightness. Therefore, in the posterior obser ...
Jeopardy
... Final Jeopardy Answer It is a conclusion that stars don’t stay the same forever, instead they follow a clear pattern of ...
... Final Jeopardy Answer It is a conclusion that stars don’t stay the same forever, instead they follow a clear pattern of ...
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.