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NASA solar probe becomes fastest object ever built as it 'touches the sun’

10 pointsby seigandoabout 4 years ago

5 comments

WalterGRabout 4 years ago
<a href="https:&#x2F;&#x2F;blogs.nasa.gov&#x2F;parkersolarprobe&#x2F;" rel="nofollow">https:&#x2F;&#x2F;blogs.nasa.gov&#x2F;parkersolarprobe&#x2F;</a> has good information and a graphic illustrating the orbits of the probe.<p>BTW, &quot;touches the sun&quot; means 6.5 million miles away. To try to put that in perspective:<p>&quot;One astronomical unit (AU) represents the mean distance between the Earth and our sun. An AU is approximately 93 million miles (150 million km). It&#x27;s approximately 8 light-minutes.&quot; [0]<p>The probe at its closest orbit will be orbiting at very approximately 1&#x2F;14 of an AU. And (again very approximately) 34 light-seconds from the Sun.<p>0 - <a href="https:&#x2F;&#x2F;earthsky.org&#x2F;space&#x2F;what-is-the-astronomical-unit" rel="nofollow">https:&#x2F;&#x2F;earthsky.org&#x2F;space&#x2F;what-is-the-astronomical-unit</a>
perl4everabout 4 years ago
I can&#x27;t stand it when popular articles quote spacecraft speeds in mph or km&#x2F;h. It&#x27;s supposed to be more relatable to laypeople, obviously, but it&#x27;s <i>not</i>.<p>What does hundreds of thousands of mph mean to me? Nothing; there&#x27;s nothing in ordinary life to compare to. Miles (or km) per <i>second</i>, now that <i>does</i> create a picture. I also can vaguely recall the order of magnitude of earth orbital speed in mi&#x2F;s, as well as the speed of light.
jamesdhuttonabout 4 years ago
Question: when they list these speeds, what is is relative to? The earth? The surface of the sun? I would be interested to hear from anyone who knows.
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op03about 4 years ago
Slow down Parker! I cant see squat in those Venus pics you are taking.
xt00about 4 years ago
It hit 532,000 km&#x2F;h at its fastest speed, or ~0.05% the speed of light.<p>1% of the speed of light would be 10.8 million km&#x2F;hr