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The United States Naval Observatory (USNO) data services page provides tools for calculating the times of sunrise, sunset, moonrise, moonset, and civil twilight, as well as rise and set times for major solar system objects and bright stars. There is a section of lunar data that includes dates of its primary phases, a tool for calculating the illuminated fraction, and a graphic that displays the apparent ... Full description.
Grade level: High (9-12), College (13-14), College (15-16), Graduate / Professional
Resource type: Modeled dataset, Calculation / Conversion tool
Subject: Space science
 
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This program calculates an estimated time of arrival for various destinations in the Universe (for example, the planet Saturn). Visitor input a value for the speed they are traveling away from Earth, and have the option of selecting the units of speed. Full description.
Grade level: Intermediate (3-5), Middle (6-8), High (9-12)
Resource type: Computer activity, Calculation / Conversion tool
Subject: Space science
 
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This program simulates the collision of an asteroid or a comet with any planet in Solar System. Users can pick one of the nine planets in the Solar System or the Earth's Moon, choose the composition and diameter (size) of the projectile, and choose the speed of the projectile. Approximate results are returned. Full description.
Grade level: Intermediate (3-5), Middle (6-8)
Resource type: Computer activity, Calculation / Conversion tool
Subject: Space science
 
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Information is presented on Blue Moons, including what they are, where the expression and name came from, and which months have the most Blue Moons. A calculator is provided to see when past and future Blue Moons have and will occur. In addition, moon phases are charted for the next and last month, year, and Metonic Cycles. General Moon information is included, along with links for further information. ... Full description.
Grade level: Intermediate (3-5), Middle (6-8), General public
Resource type: Ref. material, Calculation / Conversion tool
Subject: Space science
 
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This software tool converts geological data from the 1927 North American Datum (NAD) to the more current 1983 North American Datum version. Data may also be transformed from either NAD 27 or NAD 83 to be compatible with High Precision Geodetic Networks (HPGN), also known as High Accuracy Reference Networks. Links on this page explain exactly how, why, and when to use such conversions, and describe ... Full description.
Grade level: College (15-16), Graduate / Professional
Resource type: Calculation / Conversion tool, Software
Subject: Physical geography
 
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This map displays the Universal Transverse Mercator (UTM) grid across the globe. Links are provided to convert between UTM and latitude/longitude coordinates and for more details on referencing coordinates within each UTM zone. Full description.
Grade level: High (9-12), College (13-14), College (15-16), Graduate / Professional
Resource type: Map, Calculation / Conversion tool
Subject: Physical geography
 
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This tool allows users to find when planets are visible in a given year. The years covered by this site are 1900 to 2100. The positions given are for the 1st of the month, at 9 pm, and generally hold true for the entire month. Positions are noted by which constellation the planet is located in. The planets given are Venus, Mars, Jupiter, Saturn, Neptune, Uranus, and Pluto. Additional comments for ... Full description.
Grade level: General public
Resource type: Modeled dataset, Calculation / Conversion tool
Subject: Space science
 
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This Java applet displays the phases of the Moon for calendar years 1971-2052 by month. Clicking on the day and phase gives the phase and lumination at local noon. A downloadable version is also available. Full description.
Grade level: Middle (6-8), High (9-12), College (13-14), General public
Resource type: Calculation / Conversion tool, Code
Subject: Space science
 
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This interactive tool allows users to view sky maps for different latitudes during different times of the year. It produces a printable sky map for any given latitude, month, and time. The map indicates direction (north, south, east, west), constellations (which can be clicked for detailed information), and other objects within the sky, such as galaxies and Messier Objects. This website is part of ... Full description.
Grade level: College (13-14), College (15-16), Graduate / Professional
Resource type: Map, Calculation / Conversion tool
Subject: Space science
 
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This program calculates and depicts the effects of a rogue star coming through our solar system. Users adjust the date, the rogue star's mass, approach distance in astronomical units (AU) and flyby speed to run an animation of what would happen to the planets under the specified conditions. Full description.
Grade level: Middle (6-8), High (9-12), College (13-14)
Resource type: Visualization - scientific, Calculation / Conversion tool
Subject: Space science
 
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