Contents in DetailPosted: March 16, 2013
- Measuring time, different calendars
- Spectrum Calendar, prints a calendar for any year after 1582
- Julian Date, works out the Julian Day number for any date
- Julian Calendar, prints a complete Julian Day calendar for any month of any year
- Day of the Week, identifies the day of the week for any date
- Interval Days, the interval between any two dates from a few minutes to centuries apart
- Local Sidereal Time, calculates ‘star time’ for any date and hour
- Reaction Timer, find out your reaction time to get accurate readings.
Spheres within Spheres
- The celestial sphere and coordinate positions
- Celestial Sphere (3D images), reconstruct a 3D image via the Spectrum
- Celestial Sphere (X-eyed 3D), 3D images via your ZX printer
- Star Point, find out where a particular star or planet can be found in the sky
- Star Tracker, plots a star or planet on a representation of the sky over a 24-hour period.
- The Moon’s Phases, the phases of the moon over a monthly cycle
- Phases of the Moon, plots the Earth and Moon in orbit around each other with a full description of each phase
- UDG Moon’s Phases, using the UDG character set.
- Launch your own satellites
- Earth Orbit, put a satellite into orbit about the Earth
- Satellite Orbit, how to put a satellite into orbit around any planet.
Solar System Orbits
- Orrery, simulates the scale and relative movement of the planets about the Sun
- Bode’s Law
- Kepler’s Orbits, demonstrates the first two of Kepler’s Laws
- Orbit Foci, plotting the second focus
- Comet Orbit, eccentric orbits
- Halley’s Comet, depicts one complete orbit, 1948-2023
- Pluto’s Orbit, plots the relative positions of Pluto and Neptune from 1880-2128, one complete orbit for Pluto
- Solar Apex, corkscrew motion of a planet towards the Solar Apex.
- Solar System Trek, view the solar system from the skies of any planet on any date
- Planetary Ephemeris, trace the planets in the sky for any date
- The Moons of Mars, animated presentation of Mars and its moons
- Jupiter’s Satellites, identify and name the positions of Jupiter’s four moons on any date
- The Rings of Saturn, simulation of Saturn and its rings
- Saturn’s Rings, brief outline only
- Saturn Draw, a Computer Aided Design
- Planets through a Telescope, relative sizes of the planets
- Globe-pixel, plots a globe divided at 10° intervals of latitude and longitude
- Globe Projection, as before, using lines.
- Tri-star Orbits, places two companion stars in orbit around a central star
- Binary-star Orbit, a more normal situation, one star orbiting another
- Spirals, various options
- Galaxy, simulate the Milky Way.
- Starmaps, display a simple starmap
- Constellation Plot, entering star patterns with CHR$ CODEs
- Stellar Magnitudes, plotting differing star brightnesses
- Star Graphics, constructing complex shapes
- Flashing Stars, two ways to make stars flash
- Startrax, watch the changing shapes of the constellations over hundreds of thousands of years
- Stellar Magnitude, magnitude ranges of stars.
- The Messier List, check out the fake comets
- Telescope, the facts about telescopes, binoculars, cameras and astronomy
- Star Tester, a quiz
- Ellipses, various ellipses
- Spectrum World Map, a map of the world in CHR$ CODE.
Spectrum Hints and Tips