The Sun will "eat" the Earth?

The Sun will "eat" Earth?

Italy scientists discover, Sun burn after swelling may not be swallowed by the Earth

Http://www.thebeijingnews.com source: Beijing News

This is good news.

Prior to this, we have been informed, according to astronomers volume projections, Sun may in 50 billion years after the demise of the burn. By then, the Sun will be gradually expanded to become a "Red Star" and Venus and Saturn annexation of all substances between — including Earth. This may give devastating consequences of the solar system. However, some scientists have recently suggested that the Earth is possible in this catastrophe in survival.

A distant case

This view from Italy astronomer latest observation.

They announced that a planet in a nearby star expanded Deathwish has survived. Discover from guessing, this may mean the Earth but also the solar expansion when lucky escape death. This research in the latest issue of the journal nature.

This observation to the planet is a gas giant, made up of about quality is 3 times that of Venus.

It is in the "Phra Jia solsta" (Peasus) galaxies, around a star named V391Peas aging stars rotate. Both normal distance approximately 1.5 billion kilometers. Based in Italy Naples international Observatory, V391Peas has expanded into a "Red Star". In this process, both the gradual reduction of the distance to 0.9 billion kilometers. Nevertheless, the planet has not been affected by the significant impacts — — this is equal to the distance of Earth to the Sun.

Researchers from Svobodny, Timothy (Silvotti) indicated that this distance allows the Earth "survived".

"According to the data and new research methods, now we can know the fate of the Earth's future. ”

Svobodny, and two other from Bologna and Catania colleagues cooperation, after seven years, with 18 sets of astronomical telescope trackin

g this planet. To this end, the United States NASA peer astronomers Fu (JonathanFortney) evaluation: "this method so that we can begin to look at the stars around the planet, what will happen, such as our Sun, because it will grow old. ”

Earth's fate is still difficult to predict

V391Peas 4500 light-years from Earth, stars, quality is approximately half of the Sun.

It contains carbon helium is firing. Eventually it will become a large air masses, to "eternal form of white dwarfs". And now, it glow in a duration of 6 minutes of cyclic process. In the study of the stars of 7 years, narrative and colleagues of the 6-minute cycle. They speculate that this star has been a huge planets attract, wiggle.

But the fate of the Earth's future forecast is the study concern.

The observer says, when used as the parent star Sun aging into a "Red Star", you may have two effects: one possibility is that the Sun will release quality to save the angular momentum, this earth may be withdrawn to far more security track. Another possibility is that the Earth and the Sun between gravitational or will continue to move closer to the Earth, the Earth is likely to be eaten "the Sun". Whereas the rear in the latter case it is difficult to calculate. "Earth's fate remains uncertain, as it is caught in the annexed and survived two possible. " Astronomers Mario (Mario) evaluation.

However, even if subject to observation of planets in the expansion process V391Peas survived, the outcome may not reassuring.

Svobodny, Timothy said, when the "Red Star" to the end, the hydrogen will ignite in as a huge explosion. Explosion will result in the fragmentation of the big stars to shoot out, most of the surrounding planets will be hit.

Compilation: Jin Yu

■ The Awakening Patch

Red Star redgiant

When a star into old age, it will be the first to become a red

giant star. In the explosion of the star, its outer surface and farther away from the Centre, the temperature will be lower, light also is getting too red. However, although the temperature decreases, the volume of available red star is so large, its luminosity also become very large, very bright.

White dwarf WhiteDwarf

A low-luminosity, density, high temperature of stars.

Because of its color is white, small volume, therefore comparisons are named white dwarf. White dwarf belongs to the evolution of stars into old age. Its mass is less than 1.44 Suns quality, density as high as 106 grams-107 g/cubic centimeters.