The Hill Sphere
... sub-satellite, the same idea as above applies. The Moon has its own Hill sphere with a radius of 60,000 km (1/6th of the distance between the Earth and Moon) where a sub-satellite could exist. If an object lies outside the Moon's Hill sphere, it will orbit Earth instead of the Moon. The only problem ...
... sub-satellite, the same idea as above applies. The Moon has its own Hill sphere with a radius of 60,000 km (1/6th of the distance between the Earth and Moon) where a sub-satellite could exist. If an object lies outside the Moon's Hill sphere, it will orbit Earth instead of the Moon. The only problem ...
4. Survey Observations
... earlier for the same star to be on your meridian – each month, you must observe 2 hours earlier for the same star to be on you meridian (a given RA is on your meridian 2 hours earlier each month) • Thus, the airmass of a star changes through the year as the star becomes easier or harder to observe • ...
... earlier for the same star to be on your meridian – each month, you must observe 2 hours earlier for the same star to be on you meridian (a given RA is on your meridian 2 hours earlier each month) • Thus, the airmass of a star changes through the year as the star becomes easier or harder to observe • ...
Lecture3
... ~Sept 21 = 1st day of fall (autumn) Sun on equator (crossing from N to S) Equinoxes are intersection points of Ecliptic and Celestial Equator ...
... ~Sept 21 = 1st day of fall (autumn) Sun on equator (crossing from N to S) Equinoxes are intersection points of Ecliptic and Celestial Equator ...
The Celestial Sphere - Department of Physics and Astronomy
... Zenith: The point directly overhead There are 88 official constellations in the celestial sphere. The constellations have their origins from the Mesopotamian (1000 BC). These constellations were adapted by the ancient Greeks and compiled into a list by Claudis Ptolemy (90-168 AD). ...
... Zenith: The point directly overhead There are 88 official constellations in the celestial sphere. The constellations have their origins from the Mesopotamian (1000 BC). These constellations were adapted by the ancient Greeks and compiled into a list by Claudis Ptolemy (90-168 AD). ...
2 Coordinate systems
... The great circle RW T whose plane is perpendicular to OP is the celestial equator and its plane is parallel to that of the earth’s equator. The celestial equator and the horizon intersect in two points W and E. Now Z is the pole of the great circle N W S and P is the pole of the great circle RW T ; ...
... The great circle RW T whose plane is perpendicular to OP is the celestial equator and its plane is parallel to that of the earth’s equator. The celestial equator and the horizon intersect in two points W and E. Now Z is the pole of the great circle N W S and P is the pole of the great circle RW T ; ...
Function 1 Competence 2 - Official Website of MARINA STCW
... 10635 or the Act Establishing the Maritime Industry Authority (MARINA) as the Single Maritime Administration Responsible for the Implementation and Enforcement of the 1978 International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978, as amended and Internatio ...
... 10635 or the Act Establishing the Maritime Industry Authority (MARINA) as the Single Maritime Administration Responsible for the Implementation and Enforcement of the 1978 International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, 1978, as amended and Internatio ...
Local Horizon View
... them until the lines touch the surface of the celestial sphere. These points mark the apparent positions of those objects given in star charts, catalogs and almanacs. ...
... them until the lines touch the surface of the celestial sphere. These points mark the apparent positions of those objects given in star charts, catalogs and almanacs. ...
SCI 103
... B) the Earth's rotation on its axis C) the motion of the Moon about the Earth D) the precession of the Earth's axis of rotation E) the Sun's motion through the stars 23) On the winter solstice, the Sun ______. A) crosses the Celestial equator moving southward B) crosses the Celestial equator moving ...
... B) the Earth's rotation on its axis C) the motion of the Moon about the Earth D) the precession of the Earth's axis of rotation E) the Sun's motion through the stars 23) On the winter solstice, the Sun ______. A) crosses the Celestial equator moving southward B) crosses the Celestial equator moving ...
wk02noQ
... We can define a coordinate system as on Earth: Absolute coordinates: Declination (~ latitude) Right Ascension (~ longitude) Declination = –90 to 0 to 90 [pole – equator – pole] Right Ascension = 0 – 360 [where is RA=0 ?] ...
... We can define a coordinate system as on Earth: Absolute coordinates: Declination (~ latitude) Right Ascension (~ longitude) Declination = –90 to 0 to 90 [pole – equator – pole] Right Ascension = 0 – 360 [where is RA=0 ?] ...
Sun - UNT Physics
... 16. Why does the Sun move relative to the stars as described in the previous question? a. It is due to Earth rotating on its axis. *b. It is due to Earth revolving around the Sun. c. It is due to the Sun rotating on its axis. d. It is due to the Sun revolving around the center of our galaxy. e. The ...
... 16. Why does the Sun move relative to the stars as described in the previous question? a. It is due to Earth rotating on its axis. *b. It is due to Earth revolving around the Sun. c. It is due to the Sun rotating on its axis. d. It is due to the Sun revolving around the center of our galaxy. e. The ...
Digging Deeper - subfreshmanhomework2016-2017
... Section 2 Locating Astronomical Objects in the Night Sky ...
... Section 2 Locating Astronomical Objects in the Night Sky ...
Precession of the Equinoxes and its Importance in Calendar Making
... and south of the ecliptic. This deviation for the moon does not exceed much more than 5 degrees, while the planets deviate more than that. For instance, the deviation of Venus can be as much as 8 degrees. For this reason, ancient astronomers imagined a strip (or belt) like region extending up to 9 d ...
... and south of the ecliptic. This deviation for the moon does not exceed much more than 5 degrees, while the planets deviate more than that. For instance, the deviation of Venus can be as much as 8 degrees. For this reason, ancient astronomers imagined a strip (or belt) like region extending up to 9 d ...
Title of the Lesson
... For instance, if we are standing at 0° latitude in the Northern Hemisphere, and we look up into the night sky, the point directly over our head is known as the zenith. We will see the North Star or Polaris at 0°. The angle of Polaris above the horizon in the night sky will always match our latitude. ...
... For instance, if we are standing at 0° latitude in the Northern Hemisphere, and we look up into the night sky, the point directly over our head is known as the zenith. We will see the North Star or Polaris at 0°. The angle of Polaris above the horizon in the night sky will always match our latitude. ...
A02
... essentially down to where the sun is.) The horizon turns counterclockwise with the earth. Therefore Aries is rising. The dashed line is the horizon at noon on 11/21. (Aquarius is rising at noon.) Two hours later, Pisces is rising, and at 4pm, Aries is rising. (Every two hours, a new constellation of ...
... essentially down to where the sun is.) The horizon turns counterclockwise with the earth. Therefore Aries is rising. The dashed line is the horizon at noon on 11/21. (Aquarius is rising at noon.) Two hours later, Pisces is rising, and at 4pm, Aries is rising. (Every two hours, a new constellation of ...
Astronomy 211 EXAM 1 2003 February 6 Answer TRUE
... 21 the planet Saturn will have a right ascension of 05 h 38m and a declination of 22◦ . Report the time of day (on April 21) when Saturn crosses the meridian and its maximum altitude at Baghdad (you must report your reasoning to receive any credit). 37. State the three laws of planetary motion disco ...
... 21 the planet Saturn will have a right ascension of 05 h 38m and a declination of 22◦ . Report the time of day (on April 21) when Saturn crosses the meridian and its maximum altitude at Baghdad (you must report your reasoning to receive any credit). 37. State the three laws of planetary motion disco ...
1. What is parallax? What unit is it measured in? 1a. Parallax is the
... 1a. Parallax is the change in the direction to a star due to the Earth’s motion around the Sun. Its usually measured in arcseconds. 2. Draw a labelled diagram showing a star with a 1 arcsecond parallax. What about a star with a 2 arcsecond parallax? 2a. See class. 3. How many arcseconds in a degree? ...
... 1a. Parallax is the change in the direction to a star due to the Earth’s motion around the Sun. Its usually measured in arcseconds. 2. Draw a labelled diagram showing a star with a 1 arcsecond parallax. What about a star with a 2 arcsecond parallax? 2a. See class. 3. How many arcseconds in a degree? ...
Astro history 1
... • Why are we here (not clear on that one either…?) • Where are we? • Humans have been working on that one for a long time! ...
... • Why are we here (not clear on that one either…?) • Where are we? • Humans have been working on that one for a long time! ...
chapter01 - California State University, Long Beach
... 7. Averted vision refers to the practice of looking at faint objects out of the corner of your eye where there are more receptors for low light levels than at the center of the retina. 8. Right ascension (R.A.) is an astronomical coordinate that locates objects east-west on the sky, much like longi ...
... 7. Averted vision refers to the practice of looking at faint objects out of the corner of your eye where there are more receptors for low light levels than at the center of the retina. 8. Right ascension (R.A.) is an astronomical coordinate that locates objects east-west on the sky, much like longi ...
Sun - Cobb Learning
... 16. Why does the Sun move relative to the stars as described in the previous question? a. It is due to Earth rotating on its axis. b. It is due to Earth revolving around the Sun. c. It is due to the Sun rotating on its axis. d. It is due to the Sun revolving around the center of our galaxy. e. The S ...
... 16. Why does the Sun move relative to the stars as described in the previous question? a. It is due to Earth rotating on its axis. b. It is due to Earth revolving around the Sun. c. It is due to the Sun rotating on its axis. d. It is due to the Sun revolving around the center of our galaxy. e. The S ...
Planetary Fact Sheet – Metric
... 14. How far is the celestial equator from your zenith if your latitude is 42N? 34S? This question requires a fairly complete understanding of the celestial coordinate system and the celestial sphere model. According to the last sentence on page 43 “if a star’s declination matches your latitude it ...
... 14. How far is the celestial equator from your zenith if your latitude is 42N? 34S? This question requires a fairly complete understanding of the celestial coordinate system and the celestial sphere model. According to the last sentence on page 43 “if a star’s declination matches your latitude it ...
apparent retrograde motion - Indiana University Astronomy
... was motivated by inadequacy of existing predictions made very accurate observations of positions (this was prior to the development of the telescope) ...
... was motivated by inadequacy of existing predictions made very accurate observations of positions (this was prior to the development of the telescope) ...
Star
... • Why do we see phases of the Moon? • At any time, half the Moon is illuminated by the Sun and half is in darkness. The face of the Moon that we see is some combination of these two portions, determined by the relative locations of the Sun, Earth, and Moon. ...
... • Why do we see phases of the Moon? • At any time, half the Moon is illuminated by the Sun and half is in darkness. The face of the Moon that we see is some combination of these two portions, determined by the relative locations of the Sun, Earth, and Moon. ...
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.