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NASA launched two spacecraft called Helios to study the Sun during the 1970s. Both of these probes attained maximum speeds of around 150,000 mph (250,000 km/h) as they flew by on their closest approach to the Sun.isright yes ked is right with the answer buzzinggggggggggggggg

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13y ago
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15y ago

The Helios deep space probes were launched in the mid 1970s by the Federal Republic of Germany and NASA, using US Air Force launch vehicles. There were two in the series, Helios I and Helios II. They were launched into heliocentric orbit to study solar processes. They set a speed record for the fastest man-made objects ever at 252,792 km/h (70.2 km/s).

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11y ago

The Saturn V rockets used in the Apollo program were the fastest manned rockets, achieving speeds of around 25000 miles per hour, to escape earth's gravity, and to make it to the moon and back. 25k miles per hour is nearly 33 times the speed of sound.

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10y ago

The highest speed ever reached by an unmanned, man-made spacecraft was 252,792 km/h (157,078 mph) by the solar probes Helios I and Helios II.

The highest speed reached by a manned spacecraft was 39,896 km/h (24,790 mph) by Apollo 10 on May 26, 1969.

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15y ago

The amonatuser was the fastest spaceship but never came back to earth it goes 547 000 miles per hour

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Keenan Nugroho 16111...

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13y ago

New Horizons was the fastest rocket to date.

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12y ago

the fastest space craft presently existing is the space shuttle but presently a scientist in Houston Texas is now creating a engine that could propel a shuttle at 123,000 miles per hour

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12y ago

Helios 2 is traveling at 150,000mph kilometers per hour.

Linda S. Jean 2011

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13y ago

New Horizons was the fastest rocket to date.

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