Tag Archives: space

Solar System Center of Mass

Right now scientists are searching for new planets. They have telescopes pointed at distant stars carefully measuring how fast they move and looking for tiny deviations—or wobble—in their speed. This wobble tells us that something must be orbiting the star. When two objects are in orbit, they both orbit their respective center or mass, called [...]

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Portland at Night, from Space

This afternoon I came across a lovely collection of photos of major cities taken from space. I can never get enough of space imagery and I can only imagine what it must be like to be the person taking these photos. A friend asked if I had a similar picture of Portland and I knew [...]

Posted in Pacific NW | Also tagged , | 3 Comments