Which Constellation is Which?
... constellation. The Andromeda galaxy and the Orion nebula are examples. Earth sometimes passes through showers of meteors. The showers are named after the constellations from which they seem to fall. The Perseids and the Geminids are two examples. What Are the Constellations of the Zodiac? The Babylo ...
... constellation. The Andromeda galaxy and the Orion nebula are examples. Earth sometimes passes through showers of meteors. The showers are named after the constellations from which they seem to fall. The Perseids and the Geminids are two examples. What Are the Constellations of the Zodiac? The Babylo ...
• This chapter concentrates on five goals:
... At the bend of the handle of the Big Dipper lies a pair of stars, Mizar and Alcor. Through a telescope you can discover that Mizar has a fainter companion and so is a member of a visual binary system. Adaptive optics observations have discovered a faint close companion of Alcor, not pictured in thi ...
... At the bend of the handle of the Big Dipper lies a pair of stars, Mizar and Alcor. Through a telescope you can discover that Mizar has a fainter companion and so is a member of a visual binary system. Adaptive optics observations have discovered a faint close companion of Alcor, not pictured in thi ...
88K PDF file
... 3. Chapter 12, Question 5: Albiero, a star in the constellation Cygnus, is a binary system whose components are easily separated in a small amateur telescope. Viewers describe the brighter star as “golden” and the fainter one as “sapphire blue” (a) What does this tell you about the relative tempera ...
... 3. Chapter 12, Question 5: Albiero, a star in the constellation Cygnus, is a binary system whose components are easily separated in a small amateur telescope. Viewers describe the brighter star as “golden” and the fainter one as “sapphire blue” (a) What does this tell you about the relative tempera ...
Stellar Evolution and the Herzsprung-Russell Diagram
... • New type of pressure opposes gravity: Quantum-mechanical degeneracy pressure. • Electrons repel each other when highly compressed (not due to charge) • Requires no energy source – keeps working as the star cools • Star maintains constant radius (about same as Earth) • Example: Sirius B • Maximum m ...
... • New type of pressure opposes gravity: Quantum-mechanical degeneracy pressure. • Electrons repel each other when highly compressed (not due to charge) • Requires no energy source – keeps working as the star cools • Star maintains constant radius (about same as Earth) • Example: Sirius B • Maximum m ...
Calculating Main Sequence Lifetimes
... The luminosity (L) of a star is the energy radiated from all of its surface in one second. The absolute magnitude (M) is used usually to measure the luminosity of the stars; it is related to the stellar luminosity by an approximate relation: ⎛ L ⎞ M ≅ −2.5log⎜⎜ star ⎟⎟ + 5 ⎝ LSun ⎠ To drop t ...
... The luminosity (L) of a star is the energy radiated from all of its surface in one second. The absolute magnitude (M) is used usually to measure the luminosity of the stars; it is related to the stellar luminosity by an approximate relation: ⎛ L ⎞ M ≅ −2.5log⎜⎜ star ⎟⎟ + 5 ⎝ LSun ⎠ To drop t ...
StarFlight - Center for the Presentation of Science
... narration, guided tours and a simple user interface, to create an application suitable for nonguided use in a museum by non-scientists. The script was written to guide the viewer through the visual journey, highlight any relevant astronomical principles, and inform on the mythological basis of the c ...
... narration, guided tours and a simple user interface, to create an application suitable for nonguided use in a museum by non-scientists. The script was written to guide the viewer through the visual journey, highlight any relevant astronomical principles, and inform on the mythological basis of the c ...
Star Gazing
... • The zodiacal constellations are located along the Sun’s path on Earth (Ecliptic). • The Ecliptic is also the plane of Earth’s path around the Sun. http://lifeng.lamost.org/courses/astrotoday/CHAISSON/AT301/HTML/AT30103.HTM ...
... • The zodiacal constellations are located along the Sun’s path on Earth (Ecliptic). • The Ecliptic is also the plane of Earth’s path around the Sun. http://lifeng.lamost.org/courses/astrotoday/CHAISSON/AT301/HTML/AT30103.HTM ...
Chapter 12
... Analyzing the HR Diagram • The Stefan-Boltzmann law is a key to understanding the H-R diagram – For stars of a given temperature, the larger the radius, the larger the luminosity – Therefore, as one moves up the H-R diagram, a star’s radius must become bigger – On the other hand, for a given lumino ...
... Analyzing the HR Diagram • The Stefan-Boltzmann law is a key to understanding the H-R diagram – For stars of a given temperature, the larger the radius, the larger the luminosity – Therefore, as one moves up the H-R diagram, a star’s radius must become bigger – On the other hand, for a given lumino ...
notes
... Wide Field and Planetary Camera 2 (WFPC2) for ten consecutive days between December 18 and 28, 1995. 1,500 galaxies at various stages of evolution. Most of the galaxies are so faint (nearly 30th magnitude or about four-billion times fainter than can be seen by the human eye) they have never before b ...
... Wide Field and Planetary Camera 2 (WFPC2) for ten consecutive days between December 18 and 28, 1995. 1,500 galaxies at various stages of evolution. Most of the galaxies are so faint (nearly 30th magnitude or about four-billion times fainter than can be seen by the human eye) they have never before b ...
Stellar Evolution
... When the hydrogen starts to run out in the core, the explosive energy production of nuclear fusion no longer can balance the gravitational tendency to collapse, and so the core of the star will again start to collapse while hydrogen is still burning on the outside of the core. This gravity collapse ...
... When the hydrogen starts to run out in the core, the explosive energy production of nuclear fusion no longer can balance the gravitational tendency to collapse, and so the core of the star will again start to collapse while hydrogen is still burning on the outside of the core. This gravity collapse ...
NEUTRON STAR?
... • We will be holding an optional observing night this coming Tuesday, Nov. 8th from 7-9 p.m. on the Science Center roof. We'll be looking at Mars, stellar clusters, binary stars, and more... • Because we live in lovely cloudy Boston, we have to prepare for inclement weather. We will make an announce ...
... • We will be holding an optional observing night this coming Tuesday, Nov. 8th from 7-9 p.m. on the Science Center roof. We'll be looking at Mars, stellar clusters, binary stars, and more... • Because we live in lovely cloudy Boston, we have to prepare for inclement weather. We will make an announce ...
SBA_2 - Armagh Observatory
... waveplate to be superposed to each other, within photonnoise error bars. The observed offsets (due either to instrument flexures or seeing) are responsible for a noisier than expected profile. Combined with a less than optimal wavelength calibration, this led to a spurious field detection (for detai ...
... waveplate to be superposed to each other, within photonnoise error bars. The observed offsets (due either to instrument flexures or seeing) are responsible for a noisier than expected profile. Combined with a less than optimal wavelength calibration, this led to a spurious field detection (for detai ...
Stargazing
... is too small to be seen without a telescope. is too close to Earth to be seen without a telescope. is too close to the sun to be seen without a telescope. ...
... is too small to be seen without a telescope. is too close to Earth to be seen without a telescope. is too close to the sun to be seen without a telescope. ...
Lecture 15: The Main Sequence
... It must generate energy by “burning” H into He in its core If any of these conditions is not met, the star is not on the main-sequence. These conditions define a region on the H-R diagram where stars hang out for long periods of time. That’s why so many stars in the sky (85%) are on the main sequenc ...
... It must generate energy by “burning” H into He in its core If any of these conditions is not met, the star is not on the main-sequence. These conditions define a region on the H-R diagram where stars hang out for long periods of time. That’s why so many stars in the sky (85%) are on the main sequenc ...
March - Grand Rapids Amateur Astronomical Association
... “Astronomers have been observing some of these galaxies for many, many years, and all that time, there was a whole side to these galaxies that they simply couldn't see,” says Patrick Morrissey, an astronomer at Caltech in Pasadena, California, who collaborates at JPL. The extended arms of these gala ...
... “Astronomers have been observing some of these galaxies for many, many years, and all that time, there was a whole side to these galaxies that they simply couldn't see,” says Patrick Morrissey, an astronomer at Caltech in Pasadena, California, who collaborates at JPL. The extended arms of these gala ...
The Solar System and Beyond
... Distances between planets are very large but they are insignificant compared with distances between stars. Because units that are commonly used to measure distances on Earth such as miles or kilometers are too small for use in astronomy, other units of distance are needed. Within the solar system, t ...
... Distances between planets are very large but they are insignificant compared with distances between stars. Because units that are commonly used to measure distances on Earth such as miles or kilometers are too small for use in astronomy, other units of distance are needed. Within the solar system, t ...
preliminary version - University of Exeter
... monitoring. Unfortunately, this method has proved insensitive to periods amongst CTTs in the past, largely due to the irregular variability shown by CTTs[2,3]. This bias against CTTs is a major problem, as an obvious test of disc locking is to compare the period distribution of CTTs against WTTs. We ...
... monitoring. Unfortunately, this method has proved insensitive to periods amongst CTTs in the past, largely due to the irregular variability shown by CTTs[2,3]. This bias against CTTs is a major problem, as an obvious test of disc locking is to compare the period distribution of CTTs against WTTs. We ...
1 - Stellar Life Cycle
... center of the new star, this heats stops the rest of the star from collapsing. The balance between gravity trying to make the star shrink and heat holding it up is called Thermodynamic Equilibrium. The star then stays almost exactly the same for a long time (about 10 billion years for a star lik ...
... center of the new star, this heats stops the rest of the star from collapsing. The balance between gravity trying to make the star shrink and heat holding it up is called Thermodynamic Equilibrium. The star then stays almost exactly the same for a long time (about 10 billion years for a star lik ...
Telescope Lending Program brochure - Hamilton
... It might be best to hold your observation session in a dark area such as a park or atop a hill where a large portion of the night sky is visible. If observing from your back yard, turn off or dim lights to maximize darkness. Use skymaps.com to print an easy-to-use map to help identify planets, stars ...
... It might be best to hold your observation session in a dark area such as a park or atop a hill where a large portion of the night sky is visible. If observing from your back yard, turn off or dim lights to maximize darkness. Use skymaps.com to print an easy-to-use map to help identify planets, stars ...
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.