September 17, 2003: It's the brightest thing in the night sky. It's historically close to Earth. It's a wonder to behold through a telescope. It's ... Mars.
If you've been listening to the news for the past two months you've undoubtedly heard a lot about Mars. Mars. Mars. Mars. And just maybe, you're getting sick of Mars. Good news: There are eight other planets in the solar system. And this week you can see the two biggest ones.
First, try Saturn.
You'll have to wake up early to do it, about 5 o'clock in the morning, but that's not much earlier than usual on a school day. Look high in the eastern sky. Saturn sits in the middle of the constellation Gemini. The planet is about three and a half times brighter than Castor and Pollux, Gemini's brightest stars, so it's easy to pick out.
When observing Saturn, a telescope is recommended. Not because Saturn is dim. It's because you'll want to see the planet's magnificent rings. They're almost twice as wide as Mars, an easy target for small telescopes.
Above: On Sept. 13th, amateur astronomer Ron Wayman of Tampa, Florida, took this picture of Saturn using his 8" telescope and a digital camera.
While you're looking at Saturn's rings, consider this: they're a mystery. Astronomers aren't sure where they came from or how old they are. Some evidence suggests they formed only a few hundred million years ago--a time when dinosaurs roamed the Earth. Before then Saturn might have been a ring-less planet. You can find out more by reading Science@NASA's "The Real Lord of the Rings."
Next, look for Jupiter.
From Saturn, trace an imaginary line down toward the horizon. That leads you to Jupiter--a bright "star" shining through the rosy glow of sunrise. Jupiter has spent the past two months hiding behind the sun, but now it's emerging from the glare.
Above: Looking east-southeast just before dawn on Saturday morning, Sept. 20th. Saturn and the fat crescent moon will be pleasingly close together in the constellation Gemini.
Jupiter is five times brighter than Saturn--really eye-catching. Jupiter's cloud belts are easy to see through a telescope, as are its four largest moons: Io, Europa, Ganymede and Callisto. Together they look like a miniature solar system.
The move is designed to protect possible life on Jupiter's moon Europa from terrestrial contamination. If Galileo is reduced to atoms in Jupiter's atmosphere, it will never accidentally crash-land on Europa. No one on Earth will be able to see the impact, but it's something to think about while you're watching the giant planet this week.
If you don't feel like waking up at 5 a.m. to see Saturn and Jupiter, there's always Mars. It really is bright and wonderful--a joy to behold through a telescope. And you can behold it before bedtime. Convenient.
Just remember... it's not the only planet in the solar system.
Credits & Contacts
Author: Dr. Tony Phillips
Responsible NASA official: Ron Koczor
Production Editor: Dr.
Curator: Bryan Walls
Media Relations: Steve Roy
|The Science Directorate at NASA's Marshall Space Flight Center sponsors the Science@NASA web sites. The mission of Science@NASA is to help the public understand how exciting NASA research is and to help NASA scientists fulfill their outreach responsibilities.
Going to Saturn: NASA and the European Space Agency are sending a spacecraft to Saturn now. Named Cassini-Huygens, it will reach the ringed planet in July 2004 and go into orbit. In addition to Saturn's rings, Cassini will study the planet's weather, its moons (all 31 of them) and its magnetic field.
Galileo Mission Home Page -- (JPL) Following eight years of capturing dramatic images and surprising science from Jupiter and its moons, NASA's Galileo mission draws to a close September 21 with a plunge into Jupiter's atmosphere.
The Real Lord of the Rings -- (Science@NASA) Four hundred years after they were discovered, Saturn's breath-taking rings remain a mystery.
Harry Potter and the Moons of Jupiter -- (Science@NASA) Blistering-hot volcanoes that belch snow. Moons bigger than planets. Icy worlds with vast underground oceans. All of these things can be found in the latest Harry Potter novel. And according to NASA space probes, they're all real.