Space Archives - Page 3 of 13 - Common Sense Evaluation

NASA astronaut Karen Nyberg shows how she washes her long hair in space while living in weightlessness on the International Space Station. Hint: No rinse shampoo is a must.

Amusing How To

How To Get To Mars

June 13, 2017June 12, 2017 gags

“How To get to Mars” is a clip from the IMAX documentary “Roving Mars” from 2006. This is an edited short version.

From Wiki:

Spirit, MER-A (Mars Exploration Rover — A), is a robotic rover on Mars, active from 2004 to 2010. It was one of two rovers of NASA’s ongoing Mars Exploration Rover Mission. It landed successfully on Mars at 04:35 Ground UTC on January 4, 2004, three weeks before its twin, Opportunity (MER-B), landed on the other side of the planet. Its name was chosen through a NASA-sponsored student essay competition. The rover became stuck in late 2009, and its last communication with Earth was sent on March 22, 2010.

The rover completed its planned 90-sol mission. Aided by cleaning events that resulted in higher power from its solar panels, Spirit went on to function effectively over twenty times longer than NASA planners expected following mission completion. Spirit also logged 7.73 km (4.8 mi) of driving instead of the planned 600 m (0.4 mi), allowing more extensive geological analysis of Martian rocks and planetary surface features. Initial scientific results from the first phase of the mission (the 90-sol prime mission) were published in a special issue of the journal Science.

On May 1, 2009 (5 years, 3 months, 27 Earth days after landing; 21.6 times the planned mission duration), Spirit became stuck in soft soil. This was not the first of the mission’s “embedding events” and for the following eight months NASA carefully analyzed the situation, running Earth-based theoretical and practical simulations, and finally programming the rover to make extrication drives in an attempt to free itself. These efforts continued until January 26, 2010 when NASA officials announced that the rover was likely irrecoverably obstructed by its location in soft soil, though it continued to perform scientific research from its current location.

The rover continued in a stationary science platform role until communication with Spirit stopped on sol 2210 (March 22, 2010). JPL continued to attempt to regain contact until May 24, 2011, when NASA announced that efforts to communicate with the unresponsive rover had ended. A formal farewell was planned at NASA headquarters after the Memorial Day holiday and was televised on NASA TV.

Information

The True Size Of The Moon

June 10, 2017June 9, 2017 gags

And now for a sense of scale: a map of the U.S. overlaid on the Moon

The greatest distance between two points within the contiguous U.S. is 2,892 miles, stretching from Point Arena, CA to West Quoddy Head, ME*. The circumference of the Moon is 6,784. To help put the scale of each into perspective, redditor boredboarder8 decided to overlay one on top of the other, giving rise to the approximation you see above. [Click here for hi-res]

Writes boredboarder8:

It was difficult for me to fathom the size of the moon, thus inspiring the creation of this map. For me, this map puts the scale of the moon much smaller than I previously imagined. But it’s really interesting hearing how others (already grasping the size of the moon) now see the US as larger. [Ed.: ‘MURICA, amirite?]

It was one definitely a weird challenge to take a “flat” map of something on a sphere and project it onto a smaller sphere. Got mindfucked a few times along the way. Certainly take it only as an approximation, but what intrigued me the most is that the distance spanning the continental United States is roughly equal to a little less than half the circumference of the moon.

We repeat: this is just a rough estimate, but it’s certainly good enough for government work when it comes to illustrating the Moon’s relative dinkiness. (Or America’s hulking hugeness, depending on how patriotic you’re feeling.)

It’s strange — when we imagine objects in our solar system (even ones we know to be “small,” relative to other celestial bodies) I suspect that many of us regard them as just being unrelatably huge. They exist at scales so large, and at distances so vast, that numbers relating to mass, surface area and volume — descriptive though they may be — are rendered effectively meaningless.

So it’s always nice when images like this come along that help put things into perspective, whether it’s a side-by-side comparison of all the water on Earth relative to the Earth itself, a figure illustrating there’s more water on Jupiter’s moon Europa than there is on Earth, or a map of the U.S. slapped across the Moon’s near-side.

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