Asteroids - treasure and danger


It's not the question if, but only when an asteroid is going to collide with Earth. © Pitris / thinkstock
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On the one hand, they are life-givers and suppliers of raw materials, but on the other hand they are a deadly threat: asteroids. The relics of the early days of the solar system played a key role in the history of our planet - for better or for worse.

Today, the cosmic chunks arouse both desire and scientific curiosity. Because in the asteroids are valuable metals and other resources that could use the humanity well. Among other things, space agencies and commercial companies are planning sampling and even capture missions.

At the same time there is always the risk that an asteroid hits the earth. How dangerous such impacts can be in extreme cases, testifies among other things, the end of the dinosaurs about 65 million years ago. Accordingly active, the near-Earth asteroids are monitored today. Nevertheless, the cosmic chunks are always good for a surprise.

News on the topic

Space Dust as Ice Age Trigger? (09.19.2019)
Dust from an asteroid collision could have caused an ice age 466 million years ago

Milky Way: Extreme outbreaks on the Black Hole (16.09.2019)
Near-infrared ray thrusts this year surpass historical observations

Interstellar Comet approaching (13.09.2019)
Extrasolarer Brocken approaches the inner solar system

The day the dinos died (10.09.2019)
Drill core from Chicxulub Crater revealed first 24 hours after the asteroid impact

How does one overlook an asteroid? (08.06.2019)
Why the 100-meter chunk "2019 OK" was discovered just before his close flyby

"Random Transiter" gives up puzzles (11.07.2019)
Astronomers can not find an explanation for irregular shadowing at Stern HD 139139

"Dinokiller": Lichen as Winner (02.07.2019)
Symbiotic communities benefited from mass extinction 66 million years ago

What really happened in Tunguska? (07.01.2019)
Astronomers roll up explosion and possible originators

Mass anomaly discovered under the Moon S dpol (11.06.2019)
Huge lumps of heavy, dense material could be remainder of the asteroid core

Collision generates oxygen from CO2 (03.06.2019)
Chemists discover previously unknown decay of carbon dioxide to molecular oxygen

Did an impact shape the moon's sides? (05.21.2019)
Collision with a dwarf planet could explain asymmetries between front and back

Double asteroid passes the earth (25.04.2019)
1.5 kilometers big chunks with their own moon flies past tonight

Interstellar object hit the earth (18.04.2019)
In 2014, a meteorite likely hit extrasolar origin in the Pacific

Interstellar chunks as planetary germs? (09.04.2019)
Strangers like Oumuamua could be germ cells for new planets

A White Dwarf as planetary destroyer (05.04.2019)
Astronomers track the remainder of a planetary nucleus in the dust disk around a white dwarf

Mass grave of victims of the "Dinokiller" (01.04.2019)
Death by glass rain and tidal waves after asteroid strike 66 million years ago

YORP effect ruptures asteroid (29.03.2019)
Dust trails prove incipient decay of an asteroid by a radiation effect

Jupiter's wandering entr tselt (26.03.2019)
Giant Planet drifted inward even before forming his gas shell

Ringed White Dwarf Quarrels (20.02.2019)
Star relic is, according to current theory, much too old for dust rings

A second crater under the Gr nlandeis (12.02.2019)
Researchers discover older "twin" Hiawatha crater in northwest Greenland