SpaceX Dragon Departs Space Station after Delivering Slew of Science

A space-weathered  @SpaceX #Dragon looking great moments before release today.  Credit: NASA/Reid Wiseman

A space-weathered @SpaceX #Dragon looking great moments before release today – Oct. 25, 2014 . Credit: NASA/Reid Wiseman

Concluding a busy five week mission, the SpaceX Dragon CRS-4 commercial cargo ship departed the International Space Station (ISS) this morning, Oct. 25, after delivering a slew of some 2.5 tons of ground breaking science experiments and supplies that also inaugurated a new era in Earth science at the massive orbiting outpost.

Dragon was released from the snares of the station’s robotic arm at 9: 57 a.m. EDT while soaring some (…)
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© Ken Kremer for Universe Today, 2014. |
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You Could Fit All the Planets Between the Earth and the Moon

You could fit all the planets within the average distance to the Moon.

You could fit all the planets within the average distance to the Moon.

I ran into this intriguing infographic over on Reddit that claimed that you could fit all the planets of the Solar System within the average distance between the Earth and the Moon.

I’d honestly never heard this stat before, and it’s pretty amazing how well they tightly fit together.

But I thought it would be a good idea to doublecheck the math, just to be absolutely certain. I pulled my numbers from NASA’s Solar System Fact Sheets, and they’re a little different from the original infographic, but close enough that the comparison is still valid.

Planet Average Diameter (km)
Mercury 4,879
Venus 12,104
Mars 6,771
Jupiter 139,822
Saturn 116,464
Uranus 50,724
Neptune 49,244
Total 380,008

The average distance from the Earth to the Moon is 384,400 km. And check it out, that leaves us with 4,392 km to spare.

So what could we do with the rest of that distance? Well, we could obviously fit Pluto into that slot. It’s around 2,300 km across. Which leaves us about 2,092 km to play with. We could fit one more dwarf planet in there (not Eris though, too big).

The amazing Wolfram-Alpha can make this calculation for you automatically: total diameter —> Read More Here

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