Showing posts with label new Earth. Show all posts
Showing posts with label new Earth. Show all posts

Monday, August 22, 2016

How life emerged on Earth? The old theory is removed

The argument is the fact that, until now, knew too little information on how life on Earth is driven.

For several decades, the main hypothesis on the origins of life was linked to the formation ,, primordial soup ", an event which would have occurred during the first bodies as a result of a chemical reaction triggered within an area with warm water. Recent research however, indicate that life on Earth would have appeared in the depths of the oceans, in the so-called hydrothermal vents ,, ".

A study published in the journal Nature Microbiology suggests that the oldest common ancestor of all living beings is fed with hydrogen as a gas in a high temperature environment, such as hydrothermal vents. On the other hand, the primordial soup hypothesis ,, "says that life would appear when an energy source came into contact with water from the Earth's surface, creating simple molecules first. They were subsequently grouped into structures DNA, which in time led to the formation of the first living organisms.

Recent studies made on genes that most likely were present and there were first living cells on Earth have shown that organisms first appeared on our planet in the deep-sea hydrothermal vents. From within these structures, the alkaline fluids penetrate into the ocean water, producing the natural gaps proton concentrations in a manner similar to the activating all living cells.

The research conducted recently suggests that in the early stages of development of living organisms, chemical reactions in the cells of these variations were driven proton. Then, the cells were able to reproduce these individual differences out of the area of ​​activity of hydrothermal vents, colonizing the oceans and, eventually, the entire planet.

Hydrothermal vents are the only known natural structures that could constitute places of occurrence of the first organic molecules. Aeastă hypothesis was accepted on ,, detriment of primordial soup "because until now knew very little about the principles that govern how life is driven.



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Wednesday, August 10, 2016

Was Venus Once A Habitable World Like Earth?

Experts assume that traces habitable landforms would have disappeared after a few hundred million years.

Until now, attention to the search for a habitable planet was focused on Mars, since it is assumed that it had a structure similar to Earth. There are, however, argue that we should take into account other variables such as, for example, Venus.

In a study published in the journal Geophysical Research Letters, a team of American researchers simulated the appearance that supposedly had a Venus, recreating how its surface showed, but the amounts of sunlight that reached here. The experiment results have led scientists to conclude that the planet was habitable in 2.9 billion years ago and 715 million years before, because here there is a temperature and water surfaces similar to those on Terra.

However, no evidence was found so far to indicate the presence of water on the surface of Venus, as it happens, for example, in the case of Mars. Here, researchers have identified the fingerprints of former rivers and oceans and believe that such structures could be found on Venus, but they were reshaped during volcanic activity occurred ago over 700 million years.

Experts have assumed, since Venus there was a habitable environment, should not exclude the possibility that there existed forms of life: ,, Both planets have oceans where water might have come into contact with rocks and organic molecules, giving rise to chemical processes. From what we know so far, these are the conditions that make possible the emergence of life, "says David Grinspoon, one of the coordinators of the study conducted by the Planetary Science Institute in Arizona.

Although Venus was habitable for nearly 2 billion years, it is uncertain whether complex life forms could have developed during this period. In this regard, we are given the example of the Earth, where the development of complex organisms lasted about 3 billion years.

Even if the history of living on Venus could be considered, scientists say, however, that we need much more information to reach a conclusion in this regard

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The above post is reprinted from materials provided by iflscience.com . Note: Materials may be edited for content and length.

Saturday, July 2, 2016

4,000 confirmed exoplanets similar to Earth























If you want to look at the incredible variety of exoplanets, this is your chance.

In the past, visual artists have produced infographics to show in the simplest way possible the ever-increasing number of planets and what we know about them. This latest iteration, called the Exoplanetary Orrery V, was created by Ph.D. student Alan Zucconi from Imperial College London. It presents all confirmed exoplanets with known orbits and temperature until January 2016. The visualizations also include the habitable zones (in green) for the systems based on the luminosity of the host stars.

There are over 4,000 confirmed exoplanets and many more potential candidates waiting for confirmation. An important goal is to find among them a planet similar to Earth. So far, we have found a few “cousins” of our home planet, but a true twin is still elusive. These visualizations show that any claim of a second Earth somewhere else in the Milky Way is still a bit premature.

“Something that I wanted to investigate myself was how close those exoplanets actually were to Earth, and most of them are actually very different,” Zucconi told IFLScience. “I've seen too many articles claiming that a ‘new Earth’ has been discovered... but the truth is that this visualization shows how different these ‘twin’ planets actually are.”






































What about : kepler 22bkepler-438bkepler-186fkepler-452b ??  They are all in habitable zone, life on other planets was theoretically discovered, who says it is not so, he lives in another reality or want to mislead.


The Exoplanetary Orrery V reproduces temperatures, stellar types, elliptical orbits, and the habitable zones of the exoplanetary systems. Distance and planetary size are also included, but the scaling is different for simplicity. Planets are considerably smaller than the distances to their stars, so they were made signficantly larger.

The Orrery is based on data from the Nasa Exoplanet Archive. As more data becomes available, the Orrery will be corrected.


“I got the data last month, but I keep on updating it,” said Zucconi. “So, I’ve only included all confirmed exoplanets for which the data plotted was there. Although not all the exoplanets have known eccentricity, so in those cases I plotted [the orbit] as a circle.”

You can check out the full scope of infographics at Zucconi's website.


Solar sytem with earth







































The above post is reprinted from materials provided by iflscience. Note: Materials may be edited for content and length.
Knowledge is power.