Moon phase,lunar eclipse,planets,next meteor shower

Astronomy calculator

Astro-Physical Calculator

Astro-Physical Calculator

Astronomical Distance Calculator

Astronomical Distance Calculator

Astronomical Calculator

Astronomical Calculator

Phases of the Moon -- "Phases of the Moon--Past, Present and Future: Dates and times of New Moons, First Quarters, Full Moons and Last Quarters from 1923-2084"; also, real time moon phase updated every 60 seconds."

Lunar Perigee and Apogee Calculator -- Calculate the date, time, and distance of lunar perigees and apogees for a given year.

sun position calculator -- "This Java-based Sun position calculator will give the time of sunrise and sunset for any date and location. It will also plot a graph of the Sun's elevation and bearing over the course of that day."

Planetary Orbits

Using Kepler's Third Law -- "Kepler III gives us a very easy way to relate the period of an orbit to its mean radius. In this calculator we will use units of solar years for time and astronomical units for distance."

Elliptical Orbit Calculator -- Input planetary orbital parameters (semi-major axis, orbital eccentricity and inclination) and and calculate planetary position, area of elliptical orbit and area traversed by the planet.

FUSE Continuous Viewing Zone and Orbit Ram Calculator -- This calculator can "determine when a given target direction is in the continuous viewing zone. It also calculates when a given target lies within 20 degrees of the orbital plane and cannot be observed due to ram avoidance constraints."

Solar System Simulator -- "Select from the options...to have the simulator create a color image of your favorite planet or satellite!"

Engineering Toys and Tools -- Interactive Planetary Orbit Simulator, interactive unit conversions, java calculator and world clock.

Tools

Magnitudes and Brightness Factor Calculator -- "Convert between magnitudes and brightness factors "

Solar and Lunar Calculators

Tide Chart Calculators

Tide Chart

Moon Phases
Moon Links -
Sunrise Calendar -Printer view

Moon (lunar) phases
### Online Calculator, sure beats the old slide ruler