This is an artist's drawing of the process that creates alternating magnetic bands in the crust of a planet. The red in the picture is north and blue is south.
Click on image for full size
Courtesy of NASA
Scientists Have Found Ancient Mars to be Like Earth
News story originally written on May 10, 1999
Scientists have found that ancient Mars was similar to Earth! Magnetic field lines flow from the north pole to the south, but sometimes they
switch. When scientists look at the lines, they can see how the planet has
changed over time. Pretty cool!
Do you want to know how Earth has changed?
You might also be interested in:
The force of magnetism causes material to point along the direction the magnetic force points. Here's another picture of how this works. This picture shows where the magnetic poles of the Earth are to...more
It was another exciting and frustrating year for the space science program. It seemed that every step forward led to one backwards. Either way, NASA led the way to a great century of discovery. Unfortunately,...more
The Space Shuttle Discovery lifted off from Kennedy Space Center on October 29th at 2:19 p.m. EST. The sky was clear and the weather was great. This was the America's 123rd manned space mission. A huge...more
Scientists found a satellite orbiting the asteroid, Eugenia. This is the second one ever! A special telescope allows scientists to look through Earth's atmosphere. The first satellite found was Dactyl....more
The United States wants Russia to put the service module in orbit! The module is part of the International Space Station. It was supposed to be in space over 2 years ago. Russia just sent supplies to the...more
A coronal mass ejection (CME) happened on the Sun last month. The material that was thrown out from this explosion passed the ACE spacecraft. ACE measured some exciting things as the CME material passed...more
Trees and plants are a very important part of this Earth. Trees and plants are nature's air conditioning because they help keep our Earth cool. On a summer day, walking bare-foot on the sidewalk burns,...more