Canis Major
... Horizon System: Sky Coordinates Zenith: point directly overhead at any time Horizon: the lowest point you can see (the ground) Meridian: N / S line dividing the sky into E - W Altitude: angular distance above horizon Azimuth: compass direction North = 0o East = 90o South = 180o West = 270o Nadir: d ...
... Horizon System: Sky Coordinates Zenith: point directly overhead at any time Horizon: the lowest point you can see (the ground) Meridian: N / S line dividing the sky into E - W Altitude: angular distance above horizon Azimuth: compass direction North = 0o East = 90o South = 180o West = 270o Nadir: d ...
For stars
... the moon in at the time of your birth • Most astrological signs are incorrectly shown because they are based on your birth where the sun was during Greek times. ...
... the moon in at the time of your birth • Most astrological signs are incorrectly shown because they are based on your birth where the sun was during Greek times. ...
3 Nightly Motions
... a Day Paving the way for us to all be stressed out about how much we have to do in a day!!! ...
... a Day Paving the way for us to all be stressed out about how much we have to do in a day!!! ...
Study Guide for 1ST Astronomy Exam
... Draw and label the celestial sphere for an observer at any latitude, Draw the apparent motion of stars as seen by any observer looking North, East, South or West at any location in the northern hemisphere. Define a constellation and distinguish it from an asterism, Use celestial coordinates ...
... Draw and label the celestial sphere for an observer at any latitude, Draw the apparent motion of stars as seen by any observer looking North, East, South or West at any location in the northern hemisphere. Define a constellation and distinguish it from an asterism, Use celestial coordinates ...
The Celestial Sphere
... about the celestial pole. Some stars are circumpolar and never set, while others dip below the horizon. Which stars are which depends on where you are on Earth. The 2nd magnitude star Polaris happens to be very near the ...
... about the celestial pole. Some stars are circumpolar and never set, while others dip below the horizon. Which stars are which depends on where you are on Earth. The 2nd magnitude star Polaris happens to be very near the ...
Chapter 1
... • In summer months of Northern hemisphere, the Sun rises north of east and sets north of west • In winter months of Northern hemisphere, the Sun rises south of east and sets south of west • The solstices (about June 21 and December 21) are when the Sun rises at the most extreme north and south point ...
... • In summer months of Northern hemisphere, the Sun rises north of east and sets north of west • In winter months of Northern hemisphere, the Sun rises south of east and sets south of west • The solstices (about June 21 and December 21) are when the Sun rises at the most extreme north and south point ...
Lecture 2 - Lines in the Sky
... • In order to use the sky to measure time you need to measure the location of objects in the sky. We will look at two methods of measuring locations in the sky. • Both methods require measuring angles. • These methods have long been used not only for timekeeping but for navigation as well. • But fir ...
... • In order to use the sky to measure time you need to measure the location of objects in the sky. We will look at two methods of measuring locations in the sky. • Both methods require measuring angles. • These methods have long been used not only for timekeeping but for navigation as well. • But fir ...
Introduction to Electromagnetism
... 1.1: The Greek Tradition (Team 1): Celestial Sphere 1.2 The Copernican Revolution (Team 2): Periods; prob.1.3 Next week: 1.3 Positions on the Cel.Sph. Team 1: Altitude+ Azimuth (p.10-13), prob. 1.5 Team 2: Right Ascension and Declination (p.13-15), prob.1.4 Team 3: Precession and motion of the stars ...
... 1.1: The Greek Tradition (Team 1): Celestial Sphere 1.2 The Copernican Revolution (Team 2): Periods; prob.1.3 Next week: 1.3 Positions on the Cel.Sph. Team 1: Altitude+ Azimuth (p.10-13), prob. 1.5 Team 2: Right Ascension and Declination (p.13-15), prob.1.4 Team 3: Precession and motion of the stars ...
Lecture 3 - Night Sky and Motion of the Earth around the Sun
... make one full rotation? 1. 24 hours 2. 23 hours 56 minutes 4 seconds 3. 365.242199 days ...
... make one full rotation? 1. 24 hours 2. 23 hours 56 minutes 4 seconds 3. 365.242199 days ...
Right Ascension and Declination
... Declination is the astronomical equivalent of latitude. Declination is an angular distance of a point north or south of the Celestial Equator, a projection of the Earth’s equator into space. Declination is measured in degrees from -90° to +90°. • Celestial South Pole = -90° declination • Celestial E ...
... Declination is the astronomical equivalent of latitude. Declination is an angular distance of a point north or south of the Celestial Equator, a projection of the Earth’s equator into space. Declination is measured in degrees from -90° to +90°. • Celestial South Pole = -90° declination • Celestial E ...
Motions of the Celestial Sphere
... star is along the celestial equator. The zero point for right ascension is the vernal equinox. To find the right ascension of a star follow an hour circle "straight down" from the star to the celestial equator. The angle from the vernal equinox eastward to the foot of that hour circle is the star's ...
... star is along the celestial equator. The zero point for right ascension is the vernal equinox. To find the right ascension of a star follow an hour circle "straight down" from the star to the celestial equator. The angle from the vernal equinox eastward to the foot of that hour circle is the star's ...
night sky a field guide to the heavens
... Next, imagine Earth’s equator expanding outward until it intersects the sphere. The intersection will be a great circle on the sphere called the celestial equator. It is halfway between the north celestial pole (NCP) and the south celestial pole (SCP), which are the locations on the celestial sphere ...
... Next, imagine Earth’s equator expanding outward until it intersects the sphere. The intersection will be a great circle on the sphere called the celestial equator. It is halfway between the north celestial pole (NCP) and the south celestial pole (SCP), which are the locations on the celestial sphere ...
Celestial Sphere
... increase their altitude (angular distance from the horizon) until they cross the meridian , set in the western half of the sky (i.e., west of the meridian). ...
... increase their altitude (angular distance from the horizon) until they cross the meridian , set in the western half of the sky (i.e., west of the meridian). ...
Chapter 2 Discovering the Universe for Yourself
... Thought Question The brightest stars in a constellation… A. All belong to the same star cluster. B. All lie at about the same distance from Earth. C. May actually be quite far away from each ...
... Thought Question The brightest stars in a constellation… A. All belong to the same star cluster. B. All lie at about the same distance from Earth. C. May actually be quite far away from each ...
Review Quiz No. 1
... Pollux, the second-brightest star in the constellation “Gemini” (poss. Form: “Geminorum”) is also called … ...
... Pollux, the second-brightest star in the constellation “Gemini” (poss. Form: “Geminorum”) is also called … ...
2007-8 Astronomy Outline
... Arc minute Arc second Angular size depends on ________________ and ________________ When do astronomers use arc minutes and arc seconds? _____________________________ ...
... Arc minute Arc second Angular size depends on ________________ and ________________ When do astronomers use arc minutes and arc seconds? _____________________________ ...
Our Place in Universe
... To explain the daily and yearly motions of the heavens, ancient astronomers imagined that the Sun, Moon, stars and planets were attached to a rotating _celestial sphere_. The solar day is measured relative to the Sun, the sidereal day is measured relative to the bright and beautiful _stars__. The ap ...
... To explain the daily and yearly motions of the heavens, ancient astronomers imagined that the Sun, Moon, stars and planets were attached to a rotating _celestial sphere_. The solar day is measured relative to the Sun, the sidereal day is measured relative to the bright and beautiful _stars__. The ap ...
How Do We Know the Earth is Spherical?
... Ancient astronomers determined that the Earth is Spherical (and they could measure its size) ...
... Ancient astronomers determined that the Earth is Spherical (and they could measure its size) ...
04 Lines in the Sky
... Lines in the Sky • In order to use the sky to measure time you need to measure the location of objects in the sky. We will look at two methods of measuring locations in the sky. • Both methods require measuring angles. • These methods have long been used not only for timekeeping but for navigation a ...
... Lines in the Sky • In order to use the sky to measure time you need to measure the location of objects in the sky. We will look at two methods of measuring locations in the sky. • Both methods require measuring angles. • These methods have long been used not only for timekeeping but for navigation a ...
Celestial Coordinates Celestial Sphere: The celestial sphere is an
... meridian. The sidereal day is 23 hours, 56 minutes, and 4.1 seconds long. Sidereal Time: Official sidereal time is the day beginning at the hour angle of the vernal equinox. Star positions are given using this sidereal time. The position of a star with respect to the oberver's meridian is then relat ...
... meridian. The sidereal day is 23 hours, 56 minutes, and 4.1 seconds long. Sidereal Time: Official sidereal time is the day beginning at the hour angle of the vernal equinox. Star positions are given using this sidereal time. The position of a star with respect to the oberver's meridian is then relat ...
Lecture6
... wandering object (sun, moon, + 5 planets), in addition to the “fixed stars”. Problem: couldn’t explain retrograde motion. Solution (Ptolemy): small circles upon large (offset) circles. ...
... wandering object (sun, moon, + 5 planets), in addition to the “fixed stars”. Problem: couldn’t explain retrograde motion. Solution (Ptolemy): small circles upon large (offset) circles. ...
Glossary - Royal Astronomical Society of Canada
... angular distance above or below the celestial equator—one of the coordinates, with right ascension, that defines the position of a heavenly body on the celestial sphere ...
... angular distance above or below the celestial equator—one of the coordinates, with right ascension, that defines the position of a heavenly body on the celestial sphere ...
Coordinate Systems
... Summer solstice moves later on calendar each year. Slightly over-corrected each leap year. Cumulative annual error is corrected each century by not having a leap year, unless that year is divisible by 400 (1600 and 2000 were leap years). ...
... Summer solstice moves later on calendar each year. Slightly over-corrected each leap year. Cumulative annual error is corrected each century by not having a leap year, unless that year is divisible by 400 (1600 and 2000 were leap years). ...
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... 4. An object of great interest in astronomy can be located at the following coordinates: RA = 18h 53m 36.0s, Dec = 33° 02’ 00.0 ‘’ (Note: you may have to hunt around for it a bit) What ...
... 4. An object of great interest in astronomy can be located at the following coordinates: RA = 18h 53m 36.0s, Dec = 33° 02’ 00.0 ‘’ (Note: you may have to hunt around for it a bit) What ...
Armillary sphere
An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (in the celestial sphere), consisting of a spherical framework of rings, centred on Earth or the Sun, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic. As such, it differs from a celestial globe, which is a smooth sphere whose principal purpose is to map the constellations.With the Earth as center, an armillary sphere is known as Ptolemaic. With the sun as center, it is known as Copernican.