Handout from Allaire Star Party
... the white dwarf is visible at the center of some planetary nebulae. One of the best known planetary nebulae is the Ring Nebula in the constellation Lyra. The Ring Nebula is 57 light years from the Earth and is similar to what our Sun will look like when it dies about 5 billion years from now. The Ri ...
... the white dwarf is visible at the center of some planetary nebulae. One of the best known planetary nebulae is the Ring Nebula in the constellation Lyra. The Ring Nebula is 57 light years from the Earth and is similar to what our Sun will look like when it dies about 5 billion years from now. The Ri ...
Distance Measures: Parallax
... One of the most difficult problems in astronomy is determining the distances to objects in the sky. There are four basic methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby ...
... One of the most difficult problems in astronomy is determining the distances to objects in the sky. There are four basic methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby ...
The Magnitude scale
... The Magnitude scale Relative brightness on a backwards (!) log scale. Dates to Hipparchus. E.g., apparent relative luminosities of stars a & b are given by, ...
... The Magnitude scale Relative brightness on a backwards (!) log scale. Dates to Hipparchus. E.g., apparent relative luminosities of stars a & b are given by, ...
10 - Keele Astrophysics Group
... Firstly it was necessary to account for the fact that stars have very different radii at different stages in their evolution (i.e. their surface gravity is very different), with larger stars being more luminous. The luminosity together with the temperature completely ...
... Firstly it was necessary to account for the fact that stars have very different radii at different stages in their evolution (i.e. their surface gravity is very different), with larger stars being more luminous. The luminosity together with the temperature completely ...
How Many Stars in the Sky?
... the number of stars, you should have a whole class discussion about possible ways to solve the problem. One possible method of solving the problem is to use small squares of paper to randomly choose which sections of the picture to count. Cut out about five or six 2 cm x 2 cm squares of paper for ea ...
... the number of stars, you should have a whole class discussion about possible ways to solve the problem. One possible method of solving the problem is to use small squares of paper to randomly choose which sections of the picture to count. Cut out about five or six 2 cm x 2 cm squares of paper for ea ...
Exploration of the Kuiper Belt by High-Precision Photometric
... April using the high-speed triple-beam imaging photometer ULTRACAM (Dhillon & Marsh 2001; Beard et al. 2002), mounted at the Cassegrain focus of the 4.2 m William Herschel Telescope on La Palma. The plate scale on ULTRACAM’s three CCD detectors is 0B3 pixel1, imaging a field of 50 . The stars were ...
... April using the high-speed triple-beam imaging photometer ULTRACAM (Dhillon & Marsh 2001; Beard et al. 2002), mounted at the Cassegrain focus of the 4.2 m William Herschel Telescope on La Palma. The plate scale on ULTRACAM’s three CCD detectors is 0B3 pixel1, imaging a field of 50 . The stars were ...
Stars, Galaxies, and the Universe Section 3 Stars, Galaxies, and the
... • constellation one of 88 regions into which the skay has been divided in order to describe the locations of celestial objects; a group of stars organized in a recognizable pattern • In 1930, astronomers around the world agreed upon a standard set of 88 constellations. • You can use a map of the con ...
... • constellation one of 88 regions into which the skay has been divided in order to describe the locations of celestial objects; a group of stars organized in a recognizable pattern • In 1930, astronomers around the world agreed upon a standard set of 88 constellations. • You can use a map of the con ...
Stellar Evolution - Lick Observatory
... • A cluster starts off with stars along the full main sequence. • Because stars with larger mass evolve more quickly, the hot, luminous end of the main sequence becomes depleted with time. • The `main-sequence turnoff’ moves to progressively lower mass, L and T with time. ...
... • A cluster starts off with stars along the full main sequence. • Because stars with larger mass evolve more quickly, the hot, luminous end of the main sequence becomes depleted with time. • The `main-sequence turnoff’ moves to progressively lower mass, L and T with time. ...
The Big Dipper is a
... If your astrological sign is Aries, the Sun should be in the constellation Aries on your birthday. The dates, according to astrological tradition, during which the Sun is in the constellation Aries are: March 21 to April 20th. In which constellation is the Sun actually in, during this time period? a ...
... If your astrological sign is Aries, the Sun should be in the constellation Aries on your birthday. The dates, according to astrological tradition, during which the Sun is in the constellation Aries are: March 21 to April 20th. In which constellation is the Sun actually in, during this time period? a ...
What is the Zodiac? The Zodiac is defined by 12 constellations
... Claudius Ptolemy of Alexandria (90 – 168 AD) was a Greek astronomer who borrowed his information from the ancient Babylonian texts and he listed the 48 constellations that are recognized as the Zodiac. The IAU (International Astronomical Union) established in 1919 has identified 88 constellations. T ...
... Claudius Ptolemy of Alexandria (90 – 168 AD) was a Greek astronomer who borrowed his information from the ancient Babylonian texts and he listed the 48 constellations that are recognized as the Zodiac. The IAU (International Astronomical Union) established in 1919 has identified 88 constellations. T ...
Sermon Notes
... Claudius Ptolemy of Alexandria (90 – 168 AD) was a Greek astronomer who borrowed his information from the ancient Babylonian texts and he listed the 48 constellations that are recognized as the Zodiac. The IAU (International Astronomical Union) established in 1919 has identified 88 constellations. T ...
... Claudius Ptolemy of Alexandria (90 – 168 AD) was a Greek astronomer who borrowed his information from the ancient Babylonian texts and he listed the 48 constellations that are recognized as the Zodiac. The IAU (International Astronomical Union) established in 1919 has identified 88 constellations. T ...
Motions of the Night Sky - d_smith.lhseducators.com
... side of the moon always faces the earth. This means that the moon rotates on its axis at exactly the same rate at which it orbits the earth. We call this “locked” rotation synchronous rotation. Later, this synchronous rotation will give us a clue about the construction of the moon’s interior. ...
... side of the moon always faces the earth. This means that the moon rotates on its axis at exactly the same rate at which it orbits the earth. We call this “locked” rotation synchronous rotation. Later, this synchronous rotation will give us a clue about the construction of the moon’s interior. ...
The Bigger Picture - Astronomy and Astrophysics
... • The parallax effect is the apparent motion of a nearby object compared to distant background objects because of a change in viewing angle. • Put a finger in front of your nose and watch it move with respect to the back of the room as you look through one eye and then the other. ...
... • The parallax effect is the apparent motion of a nearby object compared to distant background objects because of a change in viewing angle. • Put a finger in front of your nose and watch it move with respect to the back of the room as you look through one eye and then the other. ...
Building the Hertzsprung
... What would be the lifetime of a star one tenth as massive as our sun? A: 1 billion years = 109 years B: 10 billion years = 1010 years C: 100 billion years = 1011 years D: 1 trillion years = 1012 years ...
... What would be the lifetime of a star one tenth as massive as our sun? A: 1 billion years = 109 years B: 10 billion years = 1010 years C: 100 billion years = 1011 years D: 1 trillion years = 1012 years ...
Measuring the Stars pages 813-820
... This is the apparent shift in position of something, because of the movement of the observer. You can see this by putting your thumb up in front of your face, and closing one eye and then the other. ...
... This is the apparent shift in position of something, because of the movement of the observer. You can see this by putting your thumb up in front of your face, and closing one eye and then the other. ...
File
... Mirrors & Telescopes Telescopes with mirrors can be built much larger than lenstelescopes - Some 10 m in diameter! - No aberration if shaped in parabolic curve ...
... Mirrors & Telescopes Telescopes with mirrors can be built much larger than lenstelescopes - Some 10 m in diameter! - No aberration if shaped in parabolic curve ...
Your Place in Space and Time
... collapse of an interstellar cloud of gas about 4 billion years ago, or about September 3 on the cosmic calendar. The Sun formed at the center of the cloud while the planets, including Earth, formed in a disk surrounding it. ...
... collapse of an interstellar cloud of gas about 4 billion years ago, or about September 3 on the cosmic calendar. The Sun formed at the center of the cloud while the planets, including Earth, formed in a disk surrounding it. ...
Ay 20 - Caltech
... (a) Using the Rayleigh criterion, estimate the theoretical diffraction limit for the angular resolution of a typical 20 cm (8 in) amateur telescope at 550 nm. Express your answer in arcseconds. (b) Using the information in Appendix C, estimate the minimum size of crater on the moon that can be resol ...
... (a) Using the Rayleigh criterion, estimate the theoretical diffraction limit for the angular resolution of a typical 20 cm (8 in) amateur telescope at 550 nm. Express your answer in arcseconds. (b) Using the information in Appendix C, estimate the minimum size of crater on the moon that can be resol ...
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.