21. Land rover debuts
> Date: July 26-Aug. 7, 1971
Apollo 15 was the first mission to include the lunar rover, which extended the range the astronauts could reach on the moon. Moonwalkers David Scott and James Irwin brought back 173 pounds of moon rocks.
22. Spacecraft orbits Mars
> Date: Nov. 13, 1971
Mariner 9 made history by becoming the first human-made object to orbit another planet when it circled Mars.
23. NASA launches Pioneer missions
> Date: March 3, 1972-present
NASA launched the Pioneer spacecrafts beginning in 1972 to prepare for possible missions to the four large planets in the solar system — Jupiter, Saturn, Uranus, and Neptune. Pioneer 10 was launched in 1972 and in 1973, NASA put Pioneer 11 into space.
24. Landsat goes into space
> Date: July 23, 1972-present
Landsat 1, launched in 1972, was a different mission for NASA. Originally called the Earth Resources Technology Satellite (ERTS), Landsat was an Earth resource mapping mission that provided data on vegetation, insect infestations, crop growth, and other land uses. Subsequent Landsat vehicles were launched in 1975 and 1978.
25. US launches Skylab
> Date: May 14, 1973
Skylab, the first American space station and laboratory, was launched into space on May 14, 1973. It orbited Earth for four years. Skylab had onboard a solar observatory, a multiple docking adapter, an airlock module with spacewalk hatches, and the orbital workshop.
Sponsored: Tips for Investing
A financial advisor can help you understand the advantages and disadvantages of investment properties. Finding a qualified financial advisor doesn’t have to be hard. SmartAsset’s free tool matches you with up to three financial advisors who serve your area, and you can interview your advisor matches at no cost to decide which one is right for you. If you’re ready to find an advisor who can help you achieve your financial goals, get started now.
Investing in real estate can diversify your portfolio. But expanding your horizons may add additional costs. If you’re an investor looking to minimize expenses, consider checking out online brokerages. They often offer low investment fees, helping you maximize your profit.