may be at very different distances Ancient times constellations loose grouping of stars based on mythology Now constellations are well-defined regions on the sky. (pgs 12-13) Celestial Sphere – NCP‚ Equator‚ Altitude = to latitude (pgs 17-18) Ecliptic – remember Sun moves 1o per day and highest motion +23.5o above or -lowest‚ 23.5o below Magnitude – bigger number is fainter‚ (pgs 15-16) Factor of 2.512 for each mag‚ (unaided eye limit ~6) Seasons – tilt of Earth’s axis (pgs 22-25) Solar day
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eclipse can occur at least two and no more than five times a year. Unlike Solar eclipses‚ lunar eclipses can only occur during a full moon and when the moon is on the ecliptic plane. Only during full moon‚ the Sun’s light will be blocked. Solar eclipses can only occur during a new moon and when the moon is on the ecliptic plane. This is the time when the moon’s shadow casts on the Earth. The total phase of a lunar eclipse can last for 90 minutes or more. The maximum time a lunar eclipse can
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circumference of the real Earth is close to 40 million metres. Celestial globes show the apparent positions of the stars in the sky. They omit the Sun‚ Moon and planets because the positions of these bodies vary relative to those of the stars‚ but the ecliptic‚ along which the Sun moves‚ is indicated. Globes are round maps of the earth that are designed with vertical and horizontal lines. These imaginary lines‚ including the equator and the prime meridian aid in finding any location on the globe. Running
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Physical Science Chapter 17 Notes The Moon Our calendar is tied to the phases of the moon. 29.5 days to circle the Earth. July 20‚ 1969 Apollo 11 landed on the moon. The astronauts placed a reflector to reflect the ray of an Earth-based laser beam. Determine the rate of continental drift Detect any change in the location of the North Pole Determine the orbit of the moon more accurate Moon is 2nd brightest object (Sun being the first) Standing on the moon‚ you would see a sunrise and sunrise
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annual path?” Ecliptic. This term also refers to the mathematical plane of Earth’s orbit. 10. By about how many degrees does the Sun move along the ecliptic each day? The Sun moves 360 degrees in 365.25 days along the ecliptic‚ so Degrees per day = (360◦ )/365.25 days = 0.986◦ = 1◦ . Round to 1 degree since the question says “about how many...” 14. What are the vernal and autumnal equinoxes? What are the summer and winter solstices? How are these four events related to the ecliptic and the celestial
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Name: Basic Coordinates & Seasons – Student Guide There are three main sections to this module: terrestrial coordinates‚ celestial equatorial coordinates‚ and understanding how the ecliptic is related to seasons on the Earth. Each of these sections has its own simulator(s). The background material necessary to utilize these tools is contained in each section. Terrestrial Coordinates Work through the explanatory material on units of longitude and latitude‚ finding longitude and latitude‚ and
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the Northern and Southern celestial hemispheres. This helps us locate celestial bodies. Ecliptics -an imaginary line on the sky that marks the annual path of the sun. It is the projection of Earth’s orbit onto the celestial sphere. Besides define the path of the sun‚ the ecliptic marks the line along which eclipses occur‚ the moon and planets and asteroids wander‚ the Zodiac constellations live. The ecliptic is even the starting point for the celestial coordinate system used by astronomers to pinpoint
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there will be a _________ visible. A. Full moon B. New moon C. First quarter moon D. Crescent moon 3. Directly above the Earth’s equator lies the ______________ in the sky. A. North celestial pole B. South celestial pole C. Celestial equator D. Ecliptic 4. All celestial objects rise in the East and set in the West because A. The Earth is rotating from east to west. B. The Earth is rotating from west to east. C. The Earth is orbiting around the Sun from east to west.
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the Earth‚ and in the same orbital plane‚ there would be total solar eclipses every single month. However‚ the Moon’s orbit is inclined (tilted) at more than 5 degrees to Earth’s orbit around the Sun (see ecliptic) so its shadow at new moon usually misses Earth. Earth’s orbit is called the ecliptic plane as the Moon’s orbit must cross this plane in order for an eclipse (both solar as well as lunar) to occur. In addition‚ the Moon’s actual orbit is elliptical‚ often taking it far enough away from Earth
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Interplanetary Trajectories in STK in a Few Hundred Easy Steps* (*and to think that last year’s students thought some guidance would be helpful!) Satellite ToolKit Interplanetary Tutorial STK Version 9 INITIAL SETUP 1) Open STK. Choose the “Create a New Scenario” button. 2) Name your scenario and‚ if you would like‚ enter a description for it. The scenario time is not too critical – it will be updated automatically as we add segments to our mission. 3) STK will give you the
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