Mt. Vernon Register-News

Community News Network

April 22, 2013

Slate: 15 facts about our planet

(Continued)

6. There is no physical place where Earth's atmosphere stops and space begins; the air just gets thinner and thinner and eventually fades away. But we love definitions, so the official height above the Earth's surface considered to be where space begins — called the Kármán line — is at an altitude of 100 km. Anyone who gets higher than that is considered an astronaut.

7. The Moon's radius is about 1/4 that of the Earth's, making it the largest satellite compared to its parent planet. Charon, Pluto's biggest moon, is about half the diameter of Pluto itself. So if you don't consider Pluto a planet, the Earth and Moon win.

8. The Moon is farther away from Earth than you think. As an analogy, if the Earth were a basketball, the Moon would be the size of a tennis ball 7.4 meters (24 feet) away.

9. The Earth's atmosphere is only transparent to a narrow slice of the electromagnetic spectrum. What we call visible light (mostly!) gets through, but most flavors of infrared, ultraviolet, X-rays and gamma-rays are stopped cold. Those last few are dangerous to life as we know it, so that works out well. But it's not a coincidence: if our air didn't protect us, we'd have evolved differently.

10. The Earth is warming up. It's a fact. Deal with it.

11. Fewer than 200 impact craters have been cataloged on Earth. The Moon has billions. We'd have just as many, but our air and water erode them over time, erasing them. Old craters on the Earth are hundreds of millions of years old; on the Moon those would be considered young.

12. An asteroid, 2010 TK7, shares an orbit with the Earth. It's about 300 meters (1000 feet) across, and never gets close enough to us to be a danger.

Text Only
Community News Network
  • 072214 Diamond Llama 1.jpg Llama on the loose corralled in Missouri town

    A llama on the lam cruised Main Street Tuesday before it mistook a resident’s fenced backyard for a place to grab a meal and freshen up.

    July 22, 2014 2 Photos

  • Screen Shot 2014-07-22 at 2.00.42 PM.png VIDEO: Train collides with semi truck carrying lighter fluid

    A truck driver from Washington is fortunate to be alive after driving his semi onto a set of tracks near Somerset, Ky., and being struck by a locomotive, which ignited his load of charcoal lighter fluid.

    July 22, 2014 1 Photo

  • mama.jpg What we get wrong about millennials living at home

    If the media is to be believed, America is facing a major crisis. "Kids," some age 25, 26, or even 30 years old, are living out of their childhood bedrooms and basements at alarmingly high numbers. The hand-wringing overlooks one problem: It's all overblown.

    July 22, 2014 1 Photo

  • Malaysians wonder 'Why us?' after second loss of airline jet

    It was all too familiar. Grieving families rushing to airport. The flashing television graphics of a plane's last radar appearance. The uncomfortable officials before a heavy thicket of microphones.
    For many Malaysians, the disappearance of Flight 370 in March has been a long trauma from which the nation has not yet recovered.

    July 18, 2014

  • The terrible history of passenger planes getting shot out of the sky

    What is more clear is that, if initial reports are true, this would be the deadliest incident of a civilian passenger plane being shot down in modern memory. In some instances, the causes of the disaster are still shrouded in mystery. Here are some of the worst events.

    July 17, 2014

  • 130408_NT_BEA_good kids We're raising a generation of timid kids

    A week ago, a woman was charged with leaving her child in the car while she went into a store. Her 11-year-old child. This week, a woman was arrested for allowing her 9-year-old daughter to go to the park alone. Which raises just one question: America, what the heck is wrong with you?

    July 17, 2014 1 Photo

  • Screen Shot 2014-07-16 at 2.12.33 PM.png Gunshots narrowly miss TV reporter

    A reporter for a West Virginia television station narrowly escaped injury or worse Monday while covering a fatal weekend shooting in Beckley.

    July 16, 2014 1 Photo

  • 25 hidden secrets in "Weird Al's" "Word Crimes" video

    Yankovic's 14th album was released this week, and it warms my heart containers that he's kept up his geeky brand of humor for so long. While he has written so many incredible songs, none have spoken to my love of proper grammar.
    Until "Word Crimes."

    July 16, 2014

  • State lawmakers tweak gun regulations

    Obtaining a concealed carry weapons license within the Commonwealth of Kentucky is not a simple task.

    July 16, 2014

  • When your doctor commits suicide, things get complicated

    When they call for appointments, patients are told they can't see their doctor. Ever. The standard line: "We are sorry, but your doctor died suddenly."

    July 15, 2014

Twitter Updates
Facebook
Stocks