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On the river - like on the highway

03.05.2004

The English company "Gibbs Technologies" began serial production of the sports car-amphibian "Aquada".

The transition from land to water takes 6 seconds: just press the button - and the wheels retract, the car is afloat. Another 5 seconds - and "Aquada" enters the redan, gliding at a speed of up to 55 kilometers per hour. Movement on water is provided by an original hydrojet installation.

Speed on land - up to 160 kilometers per hour. The fuel supply in the tank on land is enough for about 500 kilometers, on water - for 100 kilometers.

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Space amethyst in a dying star 13.11.2020

On Earth, amethysts can form when gas bubbles in lava cool under the right conditions. In space, a dying star with a mass similar to the Sun can create a structure that rivals these beautiful gems in terms of attractiveness.

When stars like the Sun burn their fuel, they shed their outer layers and the core of the star shrinks. Using NASA's Chandra X-ray Observatory, astronomers have detected a bubble of superhot gas at the center of one such outflowing star, a planetary nebula in our galaxy called IC 4593. Located about 7800 light-years from Earth, IC 4593 is the most distant planetary nebula detected by Chandra.

In this new image of IC 4593, Chandra's magenta X-rays are reminiscent of amethysts. The bubble discovered by Chandra is a gas heated to over a million degrees. These high temperatures were likely caused by material that had torn off the star's shrunken core and slammed into gas that had previously been ejected by the star.

This composite image also contains visible light data from the Hubble Space Telescope (pink and green). The pink areas in the Hubble image are an overlap of radiation from a colder gas made up of a combination of nitrogen, oxygen, and hydrogen, while the green radiation is mostly due to nitrogen.

IC 4593 is what astronomers call a "planetary nebula," which sounds deceptive because this class of objects has nothing to do with planets. The name was given about two centuries ago because they looked like the disk of a planet when viewed through a small telescope. In fact, a planetary nebula forms when the interior of a star with about the mass of the Sun contracts and its outer layers expand and cool. As for the Sun, its outer layers could extend into the orbit of Venus during its red giant phase several billion years into the future.

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