Astronomy & Space Tools

Check the current planetary K‑index and see a short‑term aurora visibility forecast for your location. Know when to look up.

Astronomy aurora forecast Kp index

See the current moon phase, illumination percentage, and which astrological sign the moon is in. Look ahead to plan events by the lunar calendar.

Astronomy moon phase sign zodiac

Enter a city name or coordinates and see today's sunrise, sunset, and twilight times. Approximate algorithm. Local.

Astronomy calculator location sunrise sunset

View the moon phase for any date in past or future. See full moon dates and eclipses for a given year.

Astronomy calendar moon phase predictor

Enter a location and date to find the exact time of solar noon, sunrise, and sunset. Astronomy tool.

Astronomy calculator noon solar sun

Select telescope and eyepiece parameters to see the field of view circle on a simulated night sky image.

Astronomy eyepiece FOV simulator telescope

Calculate the age of the moon in days since the last new moon. See illumination percentage. Simple algorithm.

Astronomy age calculator lunar moon