Mercury has no known moons or satellites, and is visible with binoculars or even the naked eye. ... The planet likely got this name due to its red color; Mars is sometimes referred to as the Red planet. ... The best time to observe Mars is in the nighttime sky, because it is visible with the naked eye. ... For more than 300 years earthly, observers have seen the Great Red Spot on Jupiter the great Red Spot is an oval about 12,000 by 25,000km (big enough to hold two Earths) (Sheehan 116). ... When it is nighttime sky, Saturn is easily visible to the naked eye. ...

• Word Count: 2531
• Approx Pages: 10
• Has Bibliography
• Grade Level: High School

Venus is usually visible to the naked eye. ... It is commonly referred to as the Red planet. ... When it is in the nighttime sky, Mars is easily visible for the naked eye. ... In the nighttime sky, Saturn is easily visible to the naked eye. ...

• Word Count: 677
• Approx Pages: 3
• Grade Level: High School

Mars, also known as the "Red Planet", is very cold and dry. ... Mars has its distinctive red color due to the oxidizing atmosphere that contains some material that produces iron in the surface ground, making it rusty. ... Dust storms also can turn the color of clouds into yellow or red. ...

• Word Count: 4020
• Approx Pages: 16
• Has Bibliography
• Grade Level: High School