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Bob Riddle

Bob Riddle lives in Lee's Summit Missouri and is adjunct faculty at Longview Community College and Avila University where he teaches Astronomy and Physical Science in the clasroom as well as online. He maintains 'Que tal in the Current Skies', an Astronomy website, and is the column editor for 'Scope on the Skies', a regular feature of Science Scope Magazine, the National Science Teachers Association middle school journal.

Bob Riddle

Science Facts Written by Bob Riddle

Astronomy

Exploring The 'Red Planet'

The planet Mars, sometimes called the 'Red Planet', has been an object of study for many centuries. The distinctive reddish color of the planet led some cultures to associate Mars with bloodshed and ... Continue reading

Global mosaic of 102 Viking 1 Orbiter images of Mars taken on orbit 1,334, 22 February 1980. The images are projected into point perspective, representing what a viewer would see from a spacecraft at an altitude of 2,500 km.
Astronomy

Two Face? Absolutely!

During the Viking missions to Mars in the mid 1970s, the planet was imaged from orbit by the Viking 1 and 2 Orbiters. These spacecraft returned images of regions of the planet that, while similar to ... Continue reading

On the first day of the Mapping Phase of the Mars Global Surveyor mission, MOC was greeted with this view of 'Happy Face Crater' smiling back at the camera from its location on the east side of Argyre Planitia. This crater is officially known as Galle Crater, and it is about 215 kilometers (134 miles) across.
Astronomy

Keeping Your Balance for Good Science

Around the 20th to 22nd of March, the Sun will have reached an astronomical location that is used to mark the change of seasons. This location, within the constellation of Pisces the Fishes, is 0 ... Continue reading

Astronomy

Look, Up in the Sky. It's A Bird. No It's A Meteorite!

Most folks probably think of swallows and the ringing of the Mission bells when the words San Juan Capistrano are heard or seen. This is a popular tradition that celebrates the return of cliff ... Continue reading