Our view of Saturn's rings changes
as Saturn goes around the Sun every 30 years. The animation above shows the full cycle. In 2005 the rings are fairly wide open.
Using an 8 inch telescope and a digital web camera, Sander Klieverik of Holland
captured this video of Jupiter's moon Io passing in front of the giant planet. The moving black dot is Io's shadow on Jupiter's cloudtops.
This sequence of images was taken in the red light of hydrogen. The large dark markings are NOT sunspots. They are shadows produced by clouds of cooler gas that have been lifted up by the sun's magnetic field. If you look carefully you will see them shining against the dark sky at the edge of the sun. (Images made at the Big Bear Solar Observatory, California)
NEW: Jan. 19d04h; Feb. 17d16h; Mar. 19d03h; Apr. 17d11h; May 16d19h; Jun 15d03h; Jul 14d12h Aug. 12d23h; Sep. 11d13h; Oct. 11d05h; Nov. 9d23h; Dec. 9d18h.
FULL: Jan 3d14h; Feb. 2d06h; Mar. 3d23h; Apr. 2d17; May 2d10h; Jun. 1d01h; Jun. 30d14h.; Jul. 30d00h; Aug. 28d11h; Sep. 26d20h; Oct. 26d05h; Nov. 24d14d; Dec. 24d01h.
FINDING THE MOON
As a general rule, the moon rises and sets about 45 minutes later each day.
MERCURY Seen low in the east before sunrise between following dates:Mar 2- Apr 25; Jul 8-Aug 8; Oct 30-Dec 1.
VENUS Aug 22 - Dec 31.
MARS Jan 1- Dec 24.
JUPITER Jan. 1 - Jun 5.
SATURN .Jan 1- Feb 10; Sep 9 - Dec 31.
Here is a chart of the positions of the planets relative to the sun in 2007. It is valid for anywhere on Earth. See below for an explanation.
On this chart, dates increase upward. This charts shows when each planet is due south (crosses the meridian.) The time of day (Local Standard Time, wherever you are) increases to the LEFT. Noon is in the middle; midnight is on the RIGHT and then moving left comes morning and noon and then afternoon, and evening. Midnight is also at the LEFT.
For example, Venus crosses your local meridian due south at 14 20 (= 2 20 pm) at the end of March.
Diagonal lines show the meridian passage of lines of equal Right Ascension, measured in hours and labelled along the bottom. For example, 0h Right Ascension crosses the meridian at noon on March 21, the time of vernal equinox.
The gray band in the middle is the daylight zone near the sun, where planets and stars are invisible. For example, Mercury emerges from the evening twilight on about Jan 23, 2007. It is visible in the morning twilight from Mar 1 to Apr 21, 2007.
Copied from the American Ephemeris, US Govt. Printing Office
Time lapse movie of Alaskan aurora.
Forecasts and Sightings