The universe was conceived as of three distinct parts
... originality. The names of the lunar months were given on the basis of the naksatra in which the full moon occurred. The twelve lunar months were divided into six seasons of two months each. There were also special names for the solar months. There are several references in the Rgveda and in the Bra ...
... originality. The names of the lunar months were given on the basis of the naksatra in which the full moon occurred. The twelve lunar months were divided into six seasons of two months each. There were also special names for the solar months. There are several references in the Rgveda and in the Bra ...
Unit Plan
... 3. Describe the motion of circumpolar constellations over the course of the night. 4. Explain the following units of measure: degree, minutes of arc, seconds of arc. 5. Approximately how many degrees of the sky does your finger width occupy? An outstretched hand? A fist? 6. In terms of angular size, ...
... 3. Describe the motion of circumpolar constellations over the course of the night. 4. Explain the following units of measure: degree, minutes of arc, seconds of arc. 5. Approximately how many degrees of the sky does your finger width occupy? An outstretched hand? A fist? 6. In terms of angular size, ...
Review: Quiz 1 Concepts Celestial sphere
... The precession of the poles was discovered by Hipparchus, but not the pattern." The daily motion of the sun is neither prograde nor retrograde. It is direct." The tropical year is 20 minutes longer than the orbital (sidereal) year." "No two orbits are exactly in the same plane, that's why conjunctio ...
... The precession of the poles was discovered by Hipparchus, but not the pattern." The daily motion of the sun is neither prograde nor retrograde. It is direct." The tropical year is 20 minutes longer than the orbital (sidereal) year." "No two orbits are exactly in the same plane, that's why conjunctio ...
Tidal Mechanism as an Impossible Cause of the Observed Secular
... of the increase in AU. Note that the value of aP p for Earth is about 100-times larger than that for Mars. Also note that the most accurate observational data for the planetary motion is from an Earth–Mars distance measurement (e.g., Standish 2005; Pitjeva 2005). Thus, let us consider the Earth–Mars ...
... of the increase in AU. Note that the value of aP p for Earth is about 100-times larger than that for Mars. Also note that the most accurate observational data for the planetary motion is from an Earth–Mars distance measurement (e.g., Standish 2005; Pitjeva 2005). Thus, let us consider the Earth–Mars ...
Required Project #1 Questions from “Guide to Using Starry Night Pro
... 16. What is the position of the sun relative to due West when it sets at different times during the year? ...
... 16. What is the position of the sun relative to due West when it sets at different times during the year? ...
Astronomy_Main_Lesson_Book_Contents_2007
... The Moon: Synodic and sidereal periods - show calculations for determining sidereal period. Explain consequences for the motion of Moon relative to the stars Astronomy History: a. Ancient Greeks – Eratosthenes - Sun-centered model, determining the size of the Earth b. Aristotle and Ptolemy – Earth-c ...
... The Moon: Synodic and sidereal periods - show calculations for determining sidereal period. Explain consequences for the motion of Moon relative to the stars Astronomy History: a. Ancient Greeks – Eratosthenes - Sun-centered model, determining the size of the Earth b. Aristotle and Ptolemy – Earth-c ...
HERE - Dundee Astronomical Society
... Illustration Courtesy of www.heavensabove.com We are now well into winter and the longer and darker evenings, so plenty of opportunities to go outside and freeze whilst looking at some of our favourite objects. This month the Moon occults Aldebaran, the eye of Taurus the Bull and the Hyades (an open ...
... Illustration Courtesy of www.heavensabove.com We are now well into winter and the longer and darker evenings, so plenty of opportunities to go outside and freeze whilst looking at some of our favourite objects. This month the Moon occults Aldebaran, the eye of Taurus the Bull and the Hyades (an open ...
Planetary Cycles
... over 29 days to complete. With reference to the Earth or a fixed star, the Moon finishes the cycle in about 28 days. This is its sidereal period. An interesting cycle to study is the Lunar or Metonic Cycle, consisting of 19 years, or 235 lunations. The discoverer of this cycle was the Greek astronom ...
... over 29 days to complete. With reference to the Earth or a fixed star, the Moon finishes the cycle in about 28 days. This is its sidereal period. An interesting cycle to study is the Lunar or Metonic Cycle, consisting of 19 years, or 235 lunations. The discoverer of this cycle was the Greek astronom ...
Celestial Equator - University of Maryland Astronomy
... The Real Reason for Seasons Orientation of Earth’s axis relative to the Sun changes as Earth orbits Sun. Summer occurs in your hemisphere when sunlight hits it more directly; winter occurs when the sunlight is less direct. Spring and fall are in between. AXIS TILT is the key to the seasons; wi ...
... The Real Reason for Seasons Orientation of Earth’s axis relative to the Sun changes as Earth orbits Sun. Summer occurs in your hemisphere when sunlight hits it more directly; winter occurs when the sunlight is less direct. Spring and fall are in between. AXIS TILT is the key to the seasons; wi ...
Obliquity and precession of the equinoxes The angle ε between the
... the more slowly moving Sun makes for longer than average days then (by as much as 20 sec per day). The Sun moves a longer distance of right ascension on the days of the solstices (since the ecliptic is parallel to the equator then); the more quickly moving Sun makes for shorter than average days (ag ...
... the more slowly moving Sun makes for longer than average days then (by as much as 20 sec per day). The Sun moves a longer distance of right ascension on the days of the solstices (since the ecliptic is parallel to the equator then); the more quickly moving Sun makes for shorter than average days (ag ...
lecture 2
... Lunar eclipses occur at FULL Moon PHASE Lunar eclipses do not occur every month because the Moon’s orbital plane is tilted with respect to the ecliptic – a total lunar eclipse occurs when the Moon crosses the ecliptic at full Moon – since the Earth’s shadow is much bigger than the Moon, total lunar ...
... Lunar eclipses occur at FULL Moon PHASE Lunar eclipses do not occur every month because the Moon’s orbital plane is tilted with respect to the ecliptic – a total lunar eclipse occurs when the Moon crosses the ecliptic at full Moon – since the Earth’s shadow is much bigger than the Moon, total lunar ...
PHY 115–003 - Oakton Community College
... 4) At a certain time of the year, the pointer stars in the Big Dipper lie directly to the left of Polaris, when viewed from Chicago at 2 am. At the same time of year, at what time would the pointers stars of the Big Dipper appear to be directly above Polaris, as viewed from Chicago? ...
... 4) At a certain time of the year, the pointer stars in the Big Dipper lie directly to the left of Polaris, when viewed from Chicago at 2 am. At the same time of year, at what time would the pointers stars of the Big Dipper appear to be directly above Polaris, as viewed from Chicago? ...
Answer - OKBU.net
... 2. What is the direction, roughly eastward or westward, for direct and retrograde motions? Answer this question below by filling in the two blanks: • Direct motion is ___eastward___________ against the background of fixed stars. • Retrograde motion is ___westward___________ against the background of ...
... 2. What is the direction, roughly eastward or westward, for direct and retrograde motions? Answer this question below by filling in the two blanks: • Direct motion is ___eastward___________ against the background of fixed stars. • Retrograde motion is ___westward___________ against the background of ...
Astronomy_Main_Lesson_Book_Contents
... iv. The analemma – when a picture of the sun is taken at the same time every day Explanation of the Seasons a. Geocentric view – description of seasons and position of sun in sky and rising point, length of day b. Heliocentric view – drawing of Earth in various positions of orbit around Sun with exp ...
... iv. The analemma – when a picture of the sun is taken at the same time every day Explanation of the Seasons a. Geocentric view – description of seasons and position of sun in sky and rising point, length of day b. Heliocentric view – drawing of Earth in various positions of orbit around Sun with exp ...
Three hundred sextillion stars
... pm, and by the end of the month its rising time is 7:30 pm. Saturn recently spent about three years in Virgo. It’s now in Libra, where it will stay throughout 2014. Venus rises in the dawn two hours before the sun. She holds her morning-star position through May. It takes Venus just 225 days to ci ...
... pm, and by the end of the month its rising time is 7:30 pm. Saturn recently spent about three years in Virgo. It’s now in Libra, where it will stay throughout 2014. Venus rises in the dawn two hours before the sun. She holds her morning-star position through May. It takes Venus just 225 days to ci ...
Eclipse PowerPoint
... Umbra is part of shadow where the sun is totally obscured, the dark part. Penumbra is the part of the shadow where the sun is partially obscured, the light part. Progress of a Lunar eclipse. The red glow is refracted red light from the Earth’s atmosphere, much like the red glow we see before su ...
... Umbra is part of shadow where the sun is totally obscured, the dark part. Penumbra is the part of the shadow where the sun is partially obscured, the light part. Progress of a Lunar eclipse. The red glow is refracted red light from the Earth’s atmosphere, much like the red glow we see before su ...
Celestial Sphere - Otterbein University
... • One celestial object hidden by other or in the shadow of another • Solar eclipse: sun hidden by the moon • Lunar eclipse: moon in earth’s shadow (sun hidden from moon by earth) • Also: eclipses of Jupiter’s moons, etc. • Most spectacular because moon and sun appear to be the same size from earth ...
... • One celestial object hidden by other or in the shadow of another • Solar eclipse: sun hidden by the moon • Lunar eclipse: moon in earth’s shadow (sun hidden from moon by earth) • Also: eclipses of Jupiter’s moons, etc. • Most spectacular because moon and sun appear to be the same size from earth ...
Chapter 1
... 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 points • The equinoxes (equal day and night and about March 21 and S ...
... 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 points • The equinoxes (equal day and night and about March 21 and S ...
Homework # 2 1. For each of the following, make a sketch showing
... Galileo was able to resolve the band of the Milky Way into individual stars ...
... Galileo was able to resolve the band of the Milky Way into individual stars ...
The Celestial Sphere
... The Moon moves westto-east in the sky (like the Sun), and takes about a month to circle the Earth (hence the word month). But once again, there’s a difference between the Moon’s sidereal period with respect to the stars (27 days), and the synodic period with respect to the Sun (29 days). ...
... The Moon moves westto-east in the sky (like the Sun), and takes about a month to circle the Earth (hence the word month). But once again, there’s a difference between the Moon’s sidereal period with respect to the stars (27 days), and the synodic period with respect to the Sun (29 days). ...
Antikythera mechanism
The Antikythera mechanism (/ˌæntɨkɨˈθɪərə/ ANT-i-ki-THEER-ə or /ˌæntɨˈkɪθərə/ ANT-i-KITH-ə-rə) is an ancient analog computer designed to predict astronomical positions and eclipses for calendrical and astrological purposes, as well as the Olympiads, the cycles of the ancient Olympic Games.Found housed in a 340 mm × 180 mm × 90 mm wooden box, the device is a complex clockwork mechanism composed of at least 30 meshing bronze gears. Its remains were found as 82 separate fragments, of which only seven contain any gears or significant inscriptions. The largest gear (clearly visible in Fragment A at right) is approximately 140 mm in diameter and originally had 223 teeth.The artifact was recovered in 1900–1901 from the Antikythera shipwreck off the Greek island of Antikythera. Believed to have been designed and constructed by Greek scientists, the instrument has been dated either between 150 and 100 BCE, or, according to a more recent view, at 205 BCE.After the knowledge of this technology was lost at some point in Antiquity, technological artifacts approaching its complexity and workmanship did not appear again until the development of mechanical astronomical clocks in Europe in the fourteenth century.All known fragments of the Antikythera mechanism are kept at the National Archaeological Museum of Athens.