Two new Earth-like planets discovered near Teegarden's Star

-
Exoplanets illustration (stock image).

An international research team led by the University of Göttingen has discovered two new Earth-like planets near one of our closest neighboring stars. "Teegarden's star" is only about 12.5 light years away from Earth and is one of the smallest known stars. It is only about 2,700 °C warm and about ten times lighter than the Sun. Although it is so close to us, the star wasn't discovered until 2003. The scientists observed the star for about three years. The results were published in the journal Astronomy and Astrophysics.
Their data clearly show the existence of two planets. "The two planets resemble the inner planets of our solar system," explains lead author Mathias Zechmeister of the Institute for Astrophysics at the University of Göttingen. "They are only slightly heavier than Earth and are located in the so-called habitable zone, where water can be present in liquid form."
The astronomers suspect that the two planets could be part of a larger system. "Many stars are apparently surrounded by systems with several planets," explains co-author Professor Stefan Dreizler of the University of Göttingen. Teegarden's star is the smallest star where researchers have so far been able to measure the weight of a planet directly. "This is a great success for the Carmenes project, which was specifically designed to search for planets around the lightest stars," says Professor Ansgar Reiners of the University of Göttingen, one of the scientific directors of the project.
Although planetary systems around similar stars are known, they have always been detected using the "transit method" -- the planets have to pass visibly in front of the star and darken it for a moment, which only happens in a very small fraction of all planetary systems. Such transits have not yet been found for the new planets. But the system is located at a special place in the sky: from Teegarden's star you can see the planets of the solar system passing in front of the Sun.
"An inhabitant of the new planets would therefore have the opportunity to view the Earth using the transit method," says Reiners. The new planets are the tenth and eleventh discovered by the team.
Carmenes is carried out by the universities of Göttingen, Hamburg, Heidelberg, and Madrid, the Max-Planck-Institut für Astronomie Heidelberg, Institutes Consejo Superior de Investigaciones Científicas in Barcelona, Granada, and Madrid, Thüringer Landessternwarte, Instituto de Astrofísica de Canarias, and Calar-Alto Observatory.

Comments

Post a Comment

Please comment on this blog-

Popular posts from this blog

E-bandage generates electricity, speeds wound healing in rats

-
Image
                                                                                                                                                       A wound covered by an electric bandage on a rat's skin (top left) healed faster than a wound under a control bandage (right). Skin has a remarkable ability to heal itself. But in some cases, wounds heal very slowly or not at all, putting a person at risk for chronic pain, infection and scarring. Now, researchers have developed a self-powered bandage that generates an electric field over an injury, dramatically reducing the healing time for skin wounds in ...
Read more

Fathers Are Happier Than Mothers, Study Shows — And Here's Why

-
Image
The third study compared fathers to mothers and their level of happiness while caring for their children. Fathers, it seems, are more likely to be happy while caring for their children than mothers. A 2019 study out of the University of California Riverside, highlights one more aspect in the divide between fathers and mothers, and more broadly, men and women. The research, a meta-analysis of three different studies, looked at the emotional health of 18,000 people and compared traits like well-being, happiness, episodes of depression, and stress. The first two studies within the research compared parents to childless people and found that fathers are happier than their child-free peers. The reason? Dads, more often than moms, report playing with their children while providing care. Now, let's unpack this a bit. We can assume, that of the 18,000 couples who took part in this research, many split household chores equally. But over recent years, much light has...
Read more

Your friends shape your microbiome — and so do their friends

-
Image
Analysis of nearly 2,000 people living in remote villages in Honduras reveals who’s spreading gut microorganisms to whom. Friends share more than just food when they dine together.Credit: Getty A shared meal, a kiss on the cheek: these social acts bring people together — and bring their microbiomes together, too. The more people interact, the more similar the make-up of their gut microorganisms is, even if individuals don’t live in the same household, a study1 shows. The study also found that a person’s microbiome is shaped not only by their social contacts but also by the social contacts’ connections. The work is one of several studies2 that raise the possibility that health conditions can be shaped by the transmission of the microbiome between individuals, not just by diet and other environmental factors that affect gut flora. In the quest to understand what shapes a person’s microbiome, social interactions are “definitely a piece of the puzzle that I think has been missing until rec...
Read more