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St. Louis Science Center: Astronomy Fact Of The Day: September 23, 2021

Today in 1999, the Mars Climate Orbiter began a planned orbital insertion maneuver around Mars. The orbiter went out of radio contact wh ...

September 23, 2021

Today in 1999, the Mars Climate Orbiter began a planned orbital insertion maneuver around Mars. The orbiter went out of radio contact when the spacecraft passed behind Mars and communication was never reestablished. It is believed the spacecraft encountered the planet at a lower than anticipated altitude and was either destroyed in the atmosphere or re-entered heliocentric space after leaving Mars’ atmosphere.

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This press release was produced by St. Louis Science Center. The views expressed here are the author’s own.

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