Gravity isn't uniform. Denser planets and objects in space — that is, things with more mass to them — experience a stronger pull of gravity. But even if you zoom in to the level of a single planet (or, in this case, our Moon), gravity isn't uniform all the way around. That's because the mass of the Moon isn't uniform, either. It varies, along with the topography. In some places, the Moon's crust is thicker. Those places have more mass, and thus, more gravitational pull.
This map, showing changes in density and gravity across the surface of the Moon, was made from data collected by Ebb and Flow — a matched set of NASA probes that mapped the Moon's gravitational field before being intentionally crashed on its surface last December. By measuring the gravitational field, these probes told us a lot about how the density of the Moon varies which, in turn, tells us a lot about topography.
You can read more about the probes (and see some videos they took of the lunar surface) at the NASA Visualization Explorer.
Blue writes, “Peter Watts has be stricken with debilitating pain, loss of range of motion and motor control. Watts’ doctors remain baffled despite a battery of tests, and Watts has reached out to his fans to ask for their theories and ideas as to what might be causing his illness.”
Today, I’ve launched a very special Kickstarter with two friends, Timothy Daly and Lawrence Azerrad. A year in the making (and many more years on our minds), the Voyager Golden Record: 40th Anniversary Edition is the first vinyl release of the stunning golden phonograph record launched by NASA in 1977 aboard the Voyager spacecraft, one […]
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Evan Kimbrell, founder of the digital agency Sprintkick, recently released a series of online courses that feature some of the best advice we’ve come across. These courses are well worth your time, and will save you from making many typical mistakes down the line if you ever want to start your own business.With this Business […]
Handy is the most convenient solution we’ve found for booking a house cleaning at the last minute, and they do a really great job. It’s as easy as heading to the site, selecting a date and time that works for you and the number of rooms in your home. We’ve even scheduled emergency cleanings as soon as the following day. […]
With all the new amazing games and consoles out there, we still can’t help but have a soft spot for old school staples. From Super Mario to Mortal Kombat, classic games just never get old. Which is why we’re so excited to relive the nostalgia with our newest deal in the Boing Boing Shop: The Complete SNES […]