Official media partner of the International Year of Astronomy.
Choose an interactive tool from below:
Mars Observer Don't miss an opportunity to observe Mars now that it lies close to Earth.
Follow the link to our program that shows you which
hemisphere of the Red Planet faces Earth for a given date and time, plus a
wealth of observing data. Use it with our four quadrant maps on p43 of the
November issue to identify the principal features on view.
Jupiter's Moons A utility to calculate the positions of Jupiter's four Galilean moons.
Field of view calculator- NEW! Use this calculator to get a feel for the size of view that different combinations of telescope and eyepiece or camera will give.
Moon phase and position- NEW!
This handy tool will show you the Moon's phase for any date you choose. It also provides a raft of information, such as RA, Dec, distance and libration angle.
Send an ecard to a friend. Choose from our gallery of photos
