Testing - Montgomery College
... planetary time periods? – Sidereal day (Earth’s rotation with respect to stars) is 4 minutes shorter than a solar day. – Sidereal month (27.3 day orbit of moon) is shorter then synodic month (29.53 day cycle of phases). – Tropical year (cycle of seasons) is 20 minutes shorter than sidereal years (ti ...
... planetary time periods? – Sidereal day (Earth’s rotation with respect to stars) is 4 minutes shorter than a solar day. – Sidereal month (27.3 day orbit of moon) is shorter then synodic month (29.53 day cycle of phases). – Tropical year (cycle of seasons) is 20 minutes shorter than sidereal years (ti ...
Stellar Evolution – Life of a Star
... • Move the “x” along the Main Sequence. Moving from bottom right to upper left, describe the ways that the stars differ. • Change the x-axis to “Spectral Type.” What is the spectral class (O, B, A) or type of our Sun?. What is Polaris’ class? • Betelgeuse (in Orion) has a temperature of 3500oK and a ...
... • Move the “x” along the Main Sequence. Moving from bottom right to upper left, describe the ways that the stars differ. • Change the x-axis to “Spectral Type.” What is the spectral class (O, B, A) or type of our Sun?. What is Polaris’ class? • Betelgeuse (in Orion) has a temperature of 3500oK and a ...
File - Mr. Gray`s Class
... – Sometimes planets appear to begin moving “backward” or eastward across the night sky. This is called Retrograde motion. Please not that if you look these words up, the directions will be backwards because Astronomers pretend like you are living on the planet looking out. For our purposes we defi ...
... – Sometimes planets appear to begin moving “backward” or eastward across the night sky. This is called Retrograde motion. Please not that if you look these words up, the directions will be backwards because Astronomers pretend like you are living on the planet looking out. For our purposes we defi ...
Pulsars - Chabot College
... Essay Questions for the exam… (a) What is a pulsar? Where does it get its ...
... Essay Questions for the exam… (a) What is a pulsar? Where does it get its ...
The barycentric motion of exoplanet host stars
... motion of the star about the system barycentre can be approximated by the linear superposition of the reflex motions due to the Keplerian orbit of each individual planet around that star-planet barycentre. If the planets have periods or close approaches such that they are dynamically interacting, th ...
... motion of the star about the system barycentre can be approximated by the linear superposition of the reflex motions due to the Keplerian orbit of each individual planet around that star-planet barycentre. If the planets have periods or close approaches such that they are dynamically interacting, th ...
Astronomy news
... The accurate parallactic distance (500 Lyrs) of RX J1856 which was supplied by HST has allowed astronomers to use the brightness to estimate its radius. The estimated radius came out to be smaller than 10 km and this was taken as possible evidence that RX J1856 was an exotic object, known as a quark ...
... The accurate parallactic distance (500 Lyrs) of RX J1856 which was supplied by HST has allowed astronomers to use the brightness to estimate its radius. The estimated radius came out to be smaller than 10 km and this was taken as possible evidence that RX J1856 was an exotic object, known as a quark ...
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... 4. Assuming that the white dwarf associated with the Ring nebula is located at the center and that the nebula has been expanding constantly at v=30 km/s, find the age of the nebula in years. Sho ...
... 4. Assuming that the white dwarf associated with the Ring nebula is located at the center and that the nebula has been expanding constantly at v=30 km/s, find the age of the nebula in years. Sho ...
SKYTRACK Glossary of Terms
... motion relative to the background stars from our vantage point, the planet is said to be stationary. Sidereal period – The time it takes for a planet (or other celestial body) to return to the same angular position (either in its orbit or its rotation) relative to the fixed stars. ...
... motion relative to the background stars from our vantage point, the planet is said to be stationary. Sidereal period – The time it takes for a planet (or other celestial body) to return to the same angular position (either in its orbit or its rotation) relative to the fixed stars. ...
Review Powerpoint - Physics and Astronomy
... • Ecliptic is plane of Earth’s path around the Sun; at 23.5° to celestial equator. • Northernmost point (above celestial equator) is summer solstice; southernmost is winter solstice; points where path crosses celestial equator are vernal and autumnal equinoxes. • Combination of day length and sunlig ...
... • Ecliptic is plane of Earth’s path around the Sun; at 23.5° to celestial equator. • Northernmost point (above celestial equator) is summer solstice; southernmost is winter solstice; points where path crosses celestial equator are vernal and autumnal equinoxes. • Combination of day length and sunlig ...
20 pm - Starmap
... Using binoculars, preferably with a tripod, will considerably enhance your star gazing experience. Many deep sky objects like galaxies and clusters will be within reach. Jupiter satellites and Saturn’s rings will also be visible. A spectacular experience for beginners in astronomy... ...
... Using binoculars, preferably with a tripod, will considerably enhance your star gazing experience. Many deep sky objects like galaxies and clusters will be within reach. Jupiter satellites and Saturn’s rings will also be visible. A spectacular experience for beginners in astronomy... ...
Types of Stars http://space.about.com/od/stars/tp/What-Are
... star is a system of two stars that are gravitationally bound to each other. They orbit around a common point, called the center of mass. It is estimated that about half of all the stars in our galaxy are part of a binary system. Visual binaries can be seen as two separate stars through a telescope. ...
... star is a system of two stars that are gravitationally bound to each other. They orbit around a common point, called the center of mass. It is estimated that about half of all the stars in our galaxy are part of a binary system. Visual binaries can be seen as two separate stars through a telescope. ...
Click here to the PowerPoint
... You might be given a data table of different sizes and lifespans of stars, and be asked to either DESCRIBE the pattern (really easy) or SUGGEST WHY there are differences (see purple box above) ...
... You might be given a data table of different sizes and lifespans of stars, and be asked to either DESCRIBE the pattern (really easy) or SUGGEST WHY there are differences (see purple box above) ...
Homework Packet Circular Motion Worksheet #1
... b) What is the magnitude of the centripetal force? 8. A student is to swing a bucket of water in a vertical circle without spilling any. a) Explain how/why this task is possible. b) If the distance from this shoulder to the center of mass of the bucket (ie. radius of the circle) is 1.0 m, what is th ...
... b) What is the magnitude of the centripetal force? 8. A student is to swing a bucket of water in a vertical circle without spilling any. a) Explain how/why this task is possible. b) If the distance from this shoulder to the center of mass of the bucket (ie. radius of the circle) is 1.0 m, what is th ...
View Professor Thaler`s presentation slides
... many measurements. That requires short-period orbits. The planet must be close to the star. ...
... many measurements. That requires short-period orbits. The planet must be close to the star. ...
Lecture 9: Hydrostatic Equilibrium
... Note that in most cases of interest in stellar structure, the radiation pressure is much less than the gas pressure and can often be neglected. The exception is the atmospheres of very hot stars, where the gas density is so low and the temperature so high that radiation pressure becomes important. A ...
... Note that in most cases of interest in stellar structure, the radiation pressure is much less than the gas pressure and can often be neglected. The exception is the atmospheres of very hot stars, where the gas density is so low and the temperature so high that radiation pressure becomes important. A ...
The GAIA astrometric survey of extra
... With the current payload design [19], the range of planetary masses between 1 Earth-mass and a few Earth-masses (Neptune-class planets) will only be marginally accessible to GAIA’s all-sky survey. Its astrometric accuracy will be sufficient to address the issue of their existence only around a handf ...
... With the current payload design [19], the range of planetary masses between 1 Earth-mass and a few Earth-masses (Neptune-class planets) will only be marginally accessible to GAIA’s all-sky survey. Its astrometric accuracy will be sufficient to address the issue of their existence only around a handf ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.