Week 8-New Home for Humans-By Idy Tam

There are about ten thousand billion billion habitable planets in the observable universe, and some of these Earth-like worlds could be found by a mission set to launch early next month, a leading planet-formation theorist now speculates. Alan Boss, astrophysicist at the Carnegie Institution in Washington, D.C. came up with that rough number by estimating there is about one habitable planets around every sun-like star in the galaxy, of which there are about 10 billion, and multiplying that by the number of galaxies in the universe. Boss said that the universe is filled with inhabitable planets and therefore life is likely to be widespread. As of now there aren’t any of these other Earths have been found. Technology simply has not allowed their discovery, presuming they exist. But astronomers are closing in. In the past nearly 15 years, more than 300 planets have been found around stars beyond the sun.

Three classes of planets have been found, for the most part — Jupiter-like gas giants, Neptune-like icy planets and hot “super-Earths.” Researcher based on the results of ongoing planet-search efforts using the gravitational tug of planets on stars to detect worlds, called the Doppler approach. Most of these super-Earths are too hot to support life, but Boss thinks there are warm super-Earths, with longer period orbits and more suitable for life. And, some of the icy planets might turn out to be rocky planets similar in composition to Earth, only more massive. Boss’s claims will be tested by NASA’s Kepler mission, a 1-meter-diameter space telescope set to launch March 5 from Cape Canaveral aboard a Delta 2 rocket. Among other tasks, Kepler is designed to count the number of Earth-sized and larger planets in the habitable zone around stars like the sun. Results should come in the next three or four years.

Once the frequency of habitable-Earth-like planets in our neighborhood of the galaxy is known, scientists will be better able to design space telescopes capable of imaging those worlds and detecting evidence of the molecules necessary for life, such as water and oxygen, and possibly even those created by life, such as methane. There is something like a few dozen solar-type stars within 30 light years of the sun. The fact that we can find [roughly Earth-sized planets] already implies that we are just seeing just the tip of the iceberg. There might be many more Earths out there waiting for us to find,” Boss said. But finding the first one will have enormous implications for how many there are in the entire galaxy as well as in the entire universe.

I can’t imagine living in another planet besides earth. This article reminds me of the movie Wall-E. Maybe finding these new habitable planets may benefit humans in the future. There is a possibility that someday Earth will become a wasteland, filled with trash. In addition, global warming will become worse and worse forcing humans to move to another planet. Hopefully that day will not come.


The human brain is the most complex system on Earth. Our brain is what distinguishes us from other living species. But what happens with there is a disorder in our brain that is caused by stroke, tumor, drug abuse, and diseases, which will defect the way that the human brain normally functions? By the American Cancer Society, the median age at death for brain cancer was 64 years of age. Additional brain cancer statistics indicate that 12,760 men and women would die of brain cancer.(#) Researchers have been trying for past years to come up with solutions to treat certain diseases and dysfunctions. The design of the artificial human brain will solve these concerns.

by Idy Tam

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