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April 24, 2018

Asteroid Science: How 'Armageddon' Got It Wrong

WAIMEA, Hawaii — In the 1998 movie “Armageddon,” an asteroid the size of Texas threatens to collide with Earth in 18 days. To save the planet from destruction, a ragtag team of deep-sea oil drillers volunteers to divert the massive space rock by burying a nuclear bomb beneath its surface and blasting it into two pieces that will fly past Earth.

But despite its entertainment value, the film is fantastically inaccurate, said astronomer Phil Plait, who writes the “Bad Astronomy” blog on Slate.com.

“Don’t go to Hollywood for advice on how to deal with an asteroid,” Plait told a small but packed audience here Saturday (Sept. 13) at HawaiiCon, a science, sci-fi and fantasy convention on the Island of Hawaii. The three-day convention featured talks and events with celebrities from popular sci-fi TV series, as well as experts on space and astronomy. [Top 10 Ways to Destroy Earth]

During his talk, Plait showed a clip from “Armageddon” in which Bruce Willis’ character struggles to detonate the bomb, by hand, before the asteroid smacks into Earth and destroys all life.

“There are more mistakes in that clip than video frames,” Plait said. In order to blow up an asteroid the size of the one in the film, the bomb would have to explode with the same amount of energy as that produced by the sun, he said.

Even if you could make such a weapon, “it would be way more dangerous than the asteroid itself.” What’s more, now you don’t just have an asteroid — you have a radioactive asteroid, he said.

But while real-life science in “Armageddon” fails miserably, you can find much more accurate science in the similarly plotted film “Deep Impact,” also released in 1998, Plait said. In that movie, a teenage amateur astronomer discovers a 7-mile-wide (11 kilometers) comet on a path that will smash into Earth in two years.

As in “Armageddon,” humanity sends a team of people to the space rock to destroy it with a nuclear weapon, but this time, the blast needed is much smaller, and the fragments produced by the explosion still end up heading for Earth. One of the pieces plunges into the Atlantic Ocean, generating a mega tsunami that floods Manhattan and many major coastlines, a scenario that is actually pretty accurate, Plait said.

But even “Deep Impact” gets some things wrong. The asteroid mission sends a spaceship to blow up the other comet chunk, producing fragments that burn up harmlessly in Earth’s atmosphere instead of causing deadly impacts — not a very likely scenario, Plait said.

In real life, asteroids and comets that could hit Earth — so-called “near-Earth objects” — do pose a threat to life on the planet.

Fortunately, NASA and other organizations, such as the B612 Foundation based in Menlo Park, California, monitor the skies for these threats. Unfortunately, not all of the dangers are detectable. In fact, scientists sometimes only discover some of these nearby space rocks after the objects have already swung by and missed the planet.

Bigger telescopes are needed to detect more of these unwelcome visitors, and the earlier they can be detected, the easier it will be to deflect them, Plait said.

Editor’s Note: This story was generated during a trip paid for by the Hawaii Tourism Bureau.

Follow Tanya Lewis on Twitter and Google+. Follow us @livescience, Facebook & Google+. Original article on Live Science.

Copyright 2014 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Source article – 

Asteroid Science: How 'Armageddon' Got It Wrong

France's camps offer family-friendly flexibility

SAINT-JUST-LUZAC, France (AP) — One son’s conquering a waterslide. The other’s at the soccer pitch leading French, British and Dutch teammates to victory. Mom’s getting a massage. Dad’s poolside chatting to his new European neighbors and plotting a barbeque.

You might not recognize this as a typical holiday in France. But this is how French families celebrate summers at 10,000 campsites nationwide, half of Europe’s total. It’s rural France at its most flexible and relaxed. Options range from frugal to fabulous. Pack a tent, fly into any French airport, rent a car and head out.

Don’t like roughing it? Neither do most Europeans, who bring their designer dogs and satellite dishes, and choose hard-roofed accommodation from mobile homes to fairy-tale cottages. The most exclusive options are booked months in advance.

I’ve gone the scruffy, improvised tent-in-suitcase route three times, sampling sites from Normandy to the Pyrenees. This summer I took my partner and sons, aged 4 and 16, to three five-star camps.

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DOMAINE DES ORMES, Brittany, northwest France

How flashy is this mega-camp? The resident owner takes helicopter day trips from his medieval chateau.

Des Ormes (The Elms) has an 18-hole golf course, hotel with spa, equestrian center, three restaurants, pub, three pools (two outdoor with wave pool and slides, one indoor with steamy jungle plants), playgrounds, turf field for sports, lakes with fishing and paddle boats, and a treetop adventure course featuring log bridges and zip lines.

You’d need a week to do it all, never mind nearby attractions like the Mont Saint-Michel monastery, walled pirate city of Saint-Malo and D-Day sites.

Activities for young and old run several times daily. On our last night, hundreds gathered at the poolside amphitheater for a camp-produced film featuring time-traveling knights. The heroes found themselves in modern-day Les Ormes defending their “castle,” the owner’s residence — and appeared live at the pool, with dozens of extras, to duel the villain. Amid eyebrow-singeing blasts of fire, the bad guy got chest-kicked into the water.

Fireworks ran 15 minutes. The boy on my shoulders loved it. Everyone else was impressed it happened at all.

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SUNELIA INTERLUDE, Ile de Re (Ile de Re), mid-Atlantic Coast

A four-hour drive south, the Ile de Re feels exclusive, starting with a 16 euro ($21.50) bridge toll.

Re is best seen by bicycle. The island, 30 kilometers (20 miles) long and 5 kilometers (3 miles) wide, is flat as a pancake with one of Europe’s most extensive bicycling networks. Paved paths run through salt beds and vineyards. Haggle at rental bike shops in one of the 10 villages, not at the campsite, to save money. Bikes can include child seats or canopied two-wheeled chariots for infants and pets.

We camped beside the beach on Re’s sandy south coast. Nature here is schizophrenic: At high tide, the sand’s been swallowed up; six hours later, you can walk a quarter-mile (half kilometer) into the Atlantic, in bath-like calm, before your feet leave the muddy sand. Hundreds of parked bicycles — and zero cars — mark the beach entrances, flanked by surf schools and catamaran clubs.

But the Interlude campsite, run by the Sunelia chain, proved a letdown despite its five stars. Its indoor complex of water-jet pools was overrun by children and had only one toilet. Its playground and sports facilities were cramped, some pathways were crumbling — my younger boy got bloody knees falling in a pothole — and its too-formal restaurant had short hours and extortionate prices. We stuck to ice cream and pizzas from the overpriced convenience store.

Fortunately, three nearby villages of whitewashed homes with pastel shutters — Le Bois Plage, with a daily market and old-school amusement rides, fortress-enclosed Saint Martin de Re, and yacht-filled port of La Flotte — offered buckets of atmosphere, seaside dining and competitive superstores.

Wildlife around our tent included feral kittens, rock-hopping lizards, and a praying mantis. We fed spiders to the ruthless, muscle-armed mantis and took it home as a prized family pet.

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SEQUOIA PARC, Poitou-Charente, southwest France

An hour’s drive south past La Rochelle and Rochefort lies the oyster capital of France and, inland, one of the finest family campsites, Sequoia Parc, on the grounds of a grand chateau.

A four-pool complex offers water slides for every age, even toddlers; a lazy river; and sundeck with non-alcoholic bar.

At the camp’s mini-zoo, my younger son loved visiting goats, chickens, geese, a sheep, badger and alpaca. There are pony rides and weekly visits from a traveling circus featuring acrobats, jugglers, camels and stunt cats, including one who escaped under the bleachers.

Nighttime entertainment beside a barnyard-converted pub and restaurant included a laughably unfunny mime and a live Shrek show that mesmerized my 4-year-old. His big brother bonded with other boys playing basketball, tennis and soccer, then hit the pools with his gaggle of Euro-lads.

My partner indulged in massages, 60 euros ($80) an hour, while I enjoyed simple things: an herb garden for cooking, starling nests inside tropically gardened shower blocks, and chatting with neighbors over candlelit Bordeaux or Cognac.

One warning: Sequoia Parc is flanked by marshland. If mosquitoes find you delicious, you’re doomed.

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If You Go…

CAMPING IN FRANCE: Most campgrounds open mid-May to September. A few like Des Ormes offer year-round facilities. Off-peak prices can be as low as 5 euros ($7) a day for campsites, with hard-roofed accommodation starting at 300 euros ($400) a week. Prices can quadruple for peak summer weeks. Companies like CanvasHolidays and Eurocamp can help book itineraries with varied lengths of stay and locations.

DOMAINE DES ORMES: http://www.lesormes.com/en/

INTERLUDE: http://en.interlude.fr/

SEQUOIA PARC: http://www.sequoiaparc.com/en/

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France's camps offer family-friendly flexibility