Perfect orientation in the city with the smallest GPS-Navi

In a strange city reliable way back to the car, which allowed according to the company the world's smallest GPS cardless "mini homer 2.4" by Navin. When leaving the car just press the mark button and the device stores the coordinates. And on the way back, the device leads unerringly back to the vehicle. The navigation system is only about the size of a matchbox and fits in a shirt pocket or on your keychain. Its battery capacity is sufficient for 14 hours of operation.

A treat the device is also for fans of geocaching, better known as the GPS scavenger hunt or treasure hunt. For he can analyze the data of up to 32 satellites simultaneously and accurately determine the location of five meters. The data logger can store up to 250 000 track points. So even big tours to record accurately and understand. Photos can also be assigned automatically to each photo location.

A sport mode informed jogger or cross-country running than walking pace, speed and altitude data. And in emergencies, the coordinates are sent to emergency services. It operated with two buttons device has also a compass and a self-Clock. With the included software "NTRIP", target data as "Points of interest are transferred directly from the home PC to the device.

The 79.90 € expensive appliance is supplied with a USB cable, a 230-volt charger, a car charger and a printed manual. Refer to it in black, white and yellow via www.znex.de.

X-ray photos show bright ring of black holes

A pair of galaxies like Arp 147 ", taken by space telescopes Hubble, is in itself a rarity. For it is not often that a spiral galaxy (a disk-shaped galaxy with a pronounced spiral pattern) with an elliptical galaxy (a galaxy with uniform light distribution without conspicuous structures) collided. What's left of the clash in 430 million light years away from Earth remained is a giant, mostly blue ring.

The collision has caused, according to the U.S. space agency NASA an expanding wave of star formation. This fascinating ring in the sky owes its brilliance to the strong radiation of young, massive stars - but only a "short" life span of a few million years. After the explosion remain neutron stars and black holes.

While the telescope "Hubble" only the range of visible light and thus could hold the sparkling blue ring reveal, now new records of the X-ray telescope "Chandra" is another startling discovery: In the ring of "Arp 147" has nine X-ray sources. The objects on the captured light so bright that it can be, according to NASA only around black holes. The astronomical objects radiate not from itself but by the sucked from them matter that heats up so much that to them in the X-ray light begins to shine, before disappearing into the black holes.

With additional infrared images of the Space Telescope "Spitzer" and "Galaxy Evolution Explorer, NASA concluded that the star-forming galaxies have achieved within the ring," Arp 147 "about 15 million years ago culminated needs.