News and Tribune

Community News Network

April 22, 2013

Slate: 15 facts about our planet

It's easy to take Earth for granted, since we see it every day. It becomes — it is — part of life's background.

But when you see the world through the eyes of science, nothing is mundane. We live on the surface of this great giant space-borne water-laden spinning rock, separated from the rest of the Universe beneath a thin veil of nitrogen and oxygen molecules. Even though you're immersed in its influence, what do you really know about the Earth?

Here are some facts about our planet for you to ponder.

1. There are a lot of different ways to measure how long it takes the Earth to go around the Sun, but if you say it takes pi x 10 million seconds, you'll only be off by a half a percent.

2. The Earth has a volume of about one trillion cubic kilometers. Can you picture a cube 1000 meters high, 1000 meters deep, 1000 meters across? Now picture a trillion of them. That's the Earth.

Actually, if you were that big, it would be easy.

3. The Earth has a mass of 6,000,000,000,000,000,000,000,000 kilograms, or, if you prefer, 6 sextillion tons. In pounds, that's actually . . . 0. Nothing. Mass is a measure of how much stuff an object contains, but weight is how hard gravity pulls on that mass. The Earth is in space, orbiting the Sun, so it's in freefall. It has mass, but no weight at all.

4. The Earth isn't a perfect sphere. It spins, so it's a flattened at the poles a little bit. The diameter through the poles is 12,713.6 kilometers (7882.4 miles), but it's 12,756.2 kilometers (7908.8 miles) through the equator. That difference of 43 kilometers is only about 0.3 percent, though, so really we're pretty close to a perfect sphere.

5. Not only is it flattened, but the gravitational forces of the sun and moon (what we call tides) distort its shape even more, pulling bulges out from it. The Earth is lumpy! Out in the deep ocean, the bulge of water due to the sun and moon can have an amplitude (change in height from minimum to maximum) of about a meter (40 inches). The solid Earth deforms due to the tides, too, with an amplitude of roughly 50 centimeters (20 inches). Even the air is affected by tides; though there are several factors that greatly complicate it (like expansion due to heating from the sun during the day, and, simply, weather).

Text Only | Photo Reprints
Community News Network
  • Wal-Mart to cut prices more aggressively in back-to-school push

    Wal-Mart Stores plans to cut prices more aggressively during this year's back-to-school season and will add inventory to its online store as the chain battles retailers for student spending.

    July 21, 2014

  • Hospitals let patients schedule ER visits

    Three times within a week, 34-year-old Michael Granillo went to the emergency room at Northridge Hospital Medical Center in Los Angeles because of intense back pain. Each time, Granillo, who didn't have insurance, stayed for less than an hour before leaving without being seen by a doctor.

    July 21, 2014

  • Starved Pennsylvania 7-year-old weighed only 25 pounds

    A 7-year-old Pennsylvania boy authorities described as being so underweight he looked like a human skeleton has been released from the hospital.

    July 21, 2014

  • 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

  • A quarter of the world's most educated people live in the 100 largest cities

    College graduates are increasingly sorting themselves into high-cost, high-amenity cities such as Washington, New York, Boston and San Francisco, a phenomenon that threatens to segregate us across the country by education.

    July 18, 2014

  • Your chocolate addiction is only going to get more expensive

    For nearly two years, cocoa prices have been on the rise. Finally, that's affecting the price you pay for a bar of chocolate - and there's reason to believe it's only the beginning.

    July 18, 2014

  • Facebook tests button to let people shop from its website

    Members on desktop computers or mobile devices can click a "buy" button to make purchases through advertisements or other posts on the world's largest social network, the Menlo Park, California-based company said Thursday in a blog post.

    July 17, 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

  • web_starbucks-cof_big_ce.jpg Starbucks sees more Apple-like stores after Colombia debut

    This week Starbucks opened its first location in Colombia — a 2,700-square-foot store with a heated patio, concrete columns, mirrors on the ceiling and walls of colorful plants.

    July 17, 2014 1 Photo

LOCAL MAGAZINES
Easter 2014 photos


Click on any photo to purchase it.

SPECIAL CONTENT
Twitter Updates
Follow us on twitter
Hyperlocal Search
Premier Guide
Find a business

Walking Fingers
Maps, Menus, Store hours, Coupons, and more...
Premier Guide
AP Video
Raw: Israel Bombs Multiple Targets in Gaza Veteran Creates Job During High Unemployment Raw: Cargo Craft Undocks From Space Station Widow: Jury Sent Big Tobacco a $23B Message New Orleans Plans to Recycle Cigarette Butts UN Security Council Calls for MH 17 Crash Probe Obama Bestows Medal of Honor on NH Veteran Texas Sending National Guard Troops to Border Hopkins to Pay $190M After Pelvic Exams Taped Foxx Cites Washington 'Circus Mirror' NASA Ceremony Honors Moon Walker Neil Armstrong Obama Voices Concern About Casualties in Mideast Diplomacy Intensifies Amid Mounting Gaza Toll AP Exclusive: American Beaten in Israel Speaks Obama Protects Gay, Transgender Workers Raw: Gaza Rescuers Search Rubble for Survivors Raw: International Team Inspects MH17 Bodies Raw: 25 Family Members Killed in Gaza Airstrike US Teen Beaten in Mideast Talks About Ordeal 'Weird Al' Is Wowed by Album's Success
2013 Photos of the year


Take a look at our most memorable photos from 2013.