6 The mysterious universe
... the gas and dust begin to collapse, forming a cloud. Such clouds of interstellar matter are called nebulae and are really like star nurseries. The Great This nuclear fusion reaction in stars Nebula in the constellation of Orion is a nebula large releases vast amounts of energy. enough to be seen wit ...
... the gas and dust begin to collapse, forming a cloud. Such clouds of interstellar matter are called nebulae and are really like star nurseries. The Great This nuclear fusion reaction in stars Nebula in the constellation of Orion is a nebula large releases vast amounts of energy. enough to be seen wit ...
The Parallax Activity: Measuring the Distances to
... of less than 10% using ground-based measurements. Other techniques must be used (see Extension Activity D) beyond 200 light years. 4. The Hipparcos satellite (1989-93) measured the positions of stars with great accuracy, since it was above the fluctuat- ing ...
... of less than 10% using ground-based measurements. Other techniques must be used (see Extension Activity D) beyond 200 light years. 4. The Hipparcos satellite (1989-93) measured the positions of stars with great accuracy, since it was above the fluctuat- ing ...
15.6 Planets Beyond the Solar System
... them of the sort that can now be detected. They are mostly gas giants like Jupiter, but closer to star. Why didn’t our Jupiter migrate? Nearly all of these have been discovered using the radial velocity method. This method (and most other methods) miss planets far from their stars, so can’t tell how ...
... them of the sort that can now be detected. They are mostly gas giants like Jupiter, but closer to star. Why didn’t our Jupiter migrate? Nearly all of these have been discovered using the radial velocity method. This method (and most other methods) miss planets far from their stars, so can’t tell how ...
The motions of the Earth
... Stars, asteroids, planets, etc. are never where the catalogs pretend. Several reasons for that: Kinematic effects: ...
... Stars, asteroids, planets, etc. are never where the catalogs pretend. Several reasons for that: Kinematic effects: ...
Computation of a comet`s orbit - Iowa Research Online
... is that we have approximate methods; only the appearance or non-appearance of cumulative errors in the course of time will show how close these approximations are. The reasons for this state of affairs are var ious and to give even a passable explanation of them, ana of the theories by which the ma ...
... is that we have approximate methods; only the appearance or non-appearance of cumulative errors in the course of time will show how close these approximations are. The reasons for this state of affairs are var ious and to give even a passable explanation of them, ana of the theories by which the ma ...
A Planetary Overview
... outer planets Jupiter, Saturn, Uranus, and Neptune were bunched closely together looking out from Earth, as they traveled their orbits around the Sun. This had not happened since the time of Napoleon. Starting in 1972, NASA scientists and engineers planned to take advantage of this situation by send ...
... outer planets Jupiter, Saturn, Uranus, and Neptune were bunched closely together looking out from Earth, as they traveled their orbits around the Sun. This had not happened since the time of Napoleon. Starting in 1972, NASA scientists and engineers planned to take advantage of this situation by send ...
Venus project - La Favre home page
... Method One for measuring diameter of Venus A ruler is used to measure Venus with this method. You have two eyes, but only one is used for looking through the telescope. The other eye can look at a ruler placed on the ground while you observe Venus. This sounds easy, but you may learn otherwise. The ...
... Method One for measuring diameter of Venus A ruler is used to measure Venus with this method. You have two eyes, but only one is used for looking through the telescope. The other eye can look at a ruler placed on the ground while you observe Venus. This sounds easy, but you may learn otherwise. The ...
Ronald C. Marks, Ph.D. Professor of Chemistry North Greenville
... Problems: Extrasolar object would have very great momentum Would have to loose this energy to stay with Earth Too much energy, hard to ...
... Problems: Extrasolar object would have very great momentum Would have to loose this energy to stay with Earth Too much energy, hard to ...
Lecture02-ASTA01 - University of Toronto
... The Brightness of the Stars In order to form the ratio of fluxes (intensities), we need to have an object with which to compare other objects. Such a standard object with assigned 0th magnitude was the star Vega (alpha Cygni, i.e. the brightest star in constellation Cygnus). A star 100 times dimmer ...
... The Brightness of the Stars In order to form the ratio of fluxes (intensities), we need to have an object with which to compare other objects. Such a standard object with assigned 0th magnitude was the star Vega (alpha Cygni, i.e. the brightest star in constellation Cygnus). A star 100 times dimmer ...
4 Distances in Astronomy
... In 1989–1993 the Hipparcos satellite measured the parallax for 120,000 stars with precision as good as 0.001 arcsec, and for another million stars with lower precision. An angle of 0.001 arcsec is comparable to the angular diameter of a golf ball viewed across the Atlantic Ocean, and corresponds to ...
... In 1989–1993 the Hipparcos satellite measured the parallax for 120,000 stars with precision as good as 0.001 arcsec, and for another million stars with lower precision. An angle of 0.001 arcsec is comparable to the angular diameter of a golf ball viewed across the Atlantic Ocean, and corresponds to ...
PLANETS
... • Outside gap, viscosity again operative Typically, gap extends to around the 2:1 resonances interior and exterior to the planet’s orbit. As disc evolves, planet moves within gap like a fluid element in the disc – i.e. usually inwards. Inward migration time ~ few x 105 yr from 5 AU. Mechanism can br ...
... • Outside gap, viscosity again operative Typically, gap extends to around the 2:1 resonances interior and exterior to the planet’s orbit. As disc evolves, planet moves within gap like a fluid element in the disc – i.e. usually inwards. Inward migration time ~ few x 105 yr from 5 AU. Mechanism can br ...
February 2015 - astronomy for beginners
... shape of Orion. The chart above shows the path that the night by night through the constellations of Taurus and comet took through January to where it will be located at Airies. Although it was moving away from us it was getting the beginning of February. The comet has been bright closer to the Sun ...
... shape of Orion. The chart above shows the path that the night by night through the constellations of Taurus and comet took through January to where it will be located at Airies. Although it was moving away from us it was getting the beginning of February. The comet has been bright closer to the Sun ...
Live from McDonald Observatory: Observing Venus: explore how it
... Did you discover anything interesting about planet Venus? Among other things to notice, students might answer that they have discovered that Venus is in a crescent, or, gibbous shape, like that of th ...
... Did you discover anything interesting about planet Venus? Among other things to notice, students might answer that they have discovered that Venus is in a crescent, or, gibbous shape, like that of th ...
slides - quantware mips center
... The stability diagrams in the plane of initial conditions "pericentric distance — eccentricity" show that Kepler-16b is in dangerous proximity to chaos domain. It is located between the "teeth" of instability in the space of orbital parameters. Kepler-16b survives because its orbit is close to the h ...
... The stability diagrams in the plane of initial conditions "pericentric distance — eccentricity" show that Kepler-16b is in dangerous proximity to chaos domain. It is located between the "teeth" of instability in the space of orbital parameters. Kepler-16b survives because its orbit is close to the h ...
powerpoint - High Energy Physics at Wayne State
... The dust tail forms when solar photons collide with the dust in the coma. Ejected dust particles form a long, curved tail that lies slightly farther our from the Sun than the nucleus' orbit. The dust tail has a yellow-white color from reflected sunlight. Both of the tails will stretch for millions ...
... The dust tail forms when solar photons collide with the dust in the coma. Ejected dust particles form a long, curved tail that lies slightly farther our from the Sun than the nucleus' orbit. The dust tail has a yellow-white color from reflected sunlight. Both of the tails will stretch for millions ...
by Kendrick Frazier Pluto turns out not to be responsible for
... he began his account, "I perceived one that appeared visibly larger than the rest." Because it had a measurable diameter, it could not be a star. H e continued his observations over the next several nights and observed definite motion. He thought his discovery was a comet, but within two months othe ...
... he began his account, "I perceived one that appeared visibly larger than the rest." Because it had a measurable diameter, it could not be a star. H e continued his observations over the next several nights and observed definite motion. He thought his discovery was a comet, but within two months othe ...
Coordinates and Time - University of Florida Astronomy
... The complexities of “normal” time Civil time (what we use every day, also known as Standard Time) is based upon the 24 hour mean solar day, but is different from LMT because of the use of time zones. ...
... The complexities of “normal” time Civil time (what we use every day, also known as Standard Time) is based upon the 24 hour mean solar day, but is different from LMT because of the use of time zones. ...
Distance Between Stars - cK-12
... determining distance. Most of these methods involve determining how bright the star they are looking at really is. For example, if the star has properties similar to the Sun, then it should be about as bright as the Sun. The astronomer compares the observed brightness to the expected brightness. ...
... determining distance. Most of these methods involve determining how bright the star they are looking at really is. For example, if the star has properties similar to the Sun, then it should be about as bright as the Sun. The astronomer compares the observed brightness to the expected brightness. ...
Astronomy - Glen Ridge Public Schools
... Teacher webpage Virtual Astronomy Laboratory United Streaming videos at http://streaming.discoveryeducation.com ...
... Teacher webpage Virtual Astronomy Laboratory United Streaming videos at http://streaming.discoveryeducation.com ...
Basic principles of celestial navigation
... point P of unknown latitude % and longitude &. The celestial sphere rotates westward from the observer’s point of view at an angular rate such that the vernal equinox transits !passes through" the observer’s meridian from east to west at intervals of 23 hour, 56 minute, 4 second of mean solar time, ...
... point P of unknown latitude % and longitude &. The celestial sphere rotates westward from the observer’s point of view at an angular rate such that the vernal equinox transits !passes through" the observer’s meridian from east to west at intervals of 23 hour, 56 minute, 4 second of mean solar time, ...
Basic principles of celestial navigation
... point P of unknown latitude % and longitude &. The celestial sphere rotates westward from the observer’s point of view at an angular rate such that the vernal equinox transits !passes through" the observer’s meridian from east to west at intervals of 23 hour, 56 minute, 4 second of mean solar time, ...
... point P of unknown latitude % and longitude &. The celestial sphere rotates westward from the observer’s point of view at an angular rate such that the vernal equinox transits !passes through" the observer’s meridian from east to west at intervals of 23 hour, 56 minute, 4 second of mean solar time, ...
Life of the Sun—16 Oct
... hydrogen in the center in 5Byr • Center of sun must shrink to get hotter to balance gravity • Sun will become a red giant. Surface expands. • Sun will become a planetary nebula • Sun will become a white dwarf ...
... hydrogen in the center in 5Byr • Center of sun must shrink to get hotter to balance gravity • Sun will become a red giant. Surface expands. • Sun will become a planetary nebula • Sun will become a white dwarf ...
Fomalhaut b: An Exoplanet Redeemed
... · The bright Moon shines below the Great Square of Pegasus's bottom corner early this evening. From the Square's left corner extends a big, slightly downward line of three stars (including the corner). These form the backbone and leg of Andromeda. ...
... · The bright Moon shines below the Great Square of Pegasus's bottom corner early this evening. From the Square's left corner extends a big, slightly downward line of three stars (including the corner). These form the backbone and leg of Andromeda. ...
habitability - Dr. Jonti Horner
... on those stars that offer a gentler climate in which life can develop – it seems that it would be both more likely to find life there, and more likely that there would be varied and plentiful enough life to provide a strong, unambiguous signal for detection. As a main sequence star ages, its luminosit ...
... on those stars that offer a gentler climate in which life can develop – it seems that it would be both more likely to find life there, and more likely that there would be varied and plentiful enough life to provide a strong, unambiguous signal for detection. As a main sequence star ages, its luminosit ...
Level 2 Meteorites, Shooting Stars, and Comets
... There are millions of such particles colliding with the atmosphere every day (I mean day and night). But since you can only see them at night, and you can only look at a small part of the sky at once, when stargazing you can expect to see a shooting star every 10 to 15 minutes. This is on a regular ...
... There are millions of such particles colliding with the atmosphere every day (I mean day and night). But since you can only see them at night, and you can only look at a small part of the sky at once, when stargazing you can expect to see a shooting star every 10 to 15 minutes. This is on a regular ...
Geocentric model
In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system) is a description of the cosmos where Earth is at the orbital center of all celestial bodies. This model served as the predominant cosmological system in many ancient civilizations such as ancient Greece including the noteworthy systems of Aristotle (see Aristotelian physics) and Ptolemy. As such, they believed that the Sun, Moon, stars, and naked eye planets circled Earth.Two commonly made observations supported the idea that Earth was the center of the Universe. The stars, the sun, and planets appear to revolve around Earth each day, making Earth the center of that system. The stars were thought to be on a celestial sphere, with the earth at its center, that rotated each day, using a line through the north and south pole as an axis. The stars closest to the equator appeared to rise and fall the greatest distance, but each star circled back to its rising point each day. The second observation supporting the geocentric model was that the Earth does not seem to move from the perspective of an Earth-bound observer, and that it is solid, stable, and unmoving.Ancient Roman and medieval philosophers usually combined the geocentric model with a spherical Earth. It is not the same as the older flat Earth model implied in some mythology, as was the case with the biblical and postbiblical Latin cosmology. The ancient Jewish Babylonian uranography pictured a flat Earth with a dome-shaped rigid canopy named firmament placed over it. (רקיע- rāqîa').However, the ancient Greeks believed that the motions of the planets were circular and not elliptical, a view that was not challenged in Western culture until the 17th century through the synthesis of theories by Copernicus and Kepler.The astronomical predictions of Ptolemy's geocentric model were used to prepare astrological and astronomical charts for over 1500 years. The geocentric model held sway into the early modern age, but from the late 16th century onward was gradually superseded by the heliocentric model of Copernicus, Galileo and Kepler. There was much resistance to the transition between these two theories. Christian theologians were reluctant to reject a theory that agreed with Bible passages (e.g. ""Sun, stand you still upon Gibeon"", Joshua 10:12 – King James 2000 Bible). Others felt a new, unknown theory could not subvert an accepted consensus for geocentrism.