Viking 1: Scouting Mars from Above
When people think of the historic Viking 1 mission, they usually picture the robotic lander resting on the dusty red soil of Mars. Yet weeks before any machine touched the surface, the spacecraft had to conquer a completely different challenge: orbital reconnaissance. Scouting the planet from high above was not just a preliminary step. It was an essential engineering effort that saved the entire mission from disaster.
On June 19, 1976, after a ten-month journey across nearly half a billion miles of space, Viking 1 fired its main propulsion engine. This critical maneuver slowed the spacecraft down, allowing the gravitational pull of Mars to capture it into orbit. At this stage, the spacecraft was actually two joined machines: an orbiter and a lander. NASA engineers had originally planned a touchdown on July 4, 1976, to coincide with the United States Bicentennial. However, the mission planners wisely decided to verify their landing site first.
- reconnaissance:
- The act of scouting or exploring an area to gather information.
- maneuver:
- A planned movement or action that requires skill and care.
- propulsion:
- The force or system that drives an object forward.
- infrared:
- A type of light invisible to the human eye, often used to detect heat.
- hazardous:
- Dangerous or full of risks.
- relay:
- A system or device that passes along signals or information.
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Preview questions from this passageShowHide
- 1What two joined components made up the Viking 1 spacecraft when it entered Mars's orbit?
- 2Why was orbital reconnaissance essential before releasing the Viking 1 lander?
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About this explanatory article passage for 5th Grade
“Viking 1: Scouting Mars from Above” is a explanatory article reading passage about Viking 1 Mars orbital reconnaissance, written for 5th Grade. It takes about 3 minutes to read (482 words) and comes with an interactive quiz and a printable worksheet with comprehension questions and an answer key.