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Astronomers have found that a diffuse X-ray glow in our galaxy is not generated by hot gas but rather it's radiating from old stars that have yet to be counted.
There could be roughly a billion stars we didn't know about in the Milky Way, they said Wednesday.
The discovery, if confirmed, "would have a profound impact on our understanding of the history of our galaxy, from star-formation and supernova rates to stellar evolution," according to a statement released by NASA.
The Growing Habitable Zone: Locations for Life Abound
In a galaxy filled with billions of stars, scientists searching for alien life need some way to pick out those which are most likely to harbor habitable planets and moons. For more than 150 years, an important tool in this screening process has been the concept of a "circumstellar habitable zone."
Traditionally, this zone has been defined as a narrow disk around a star where temperatures are moderate enough that water on the surface of a planet can exist in a liquid form. The idea is that where liquid water exists, life might arise.
Beginning in the latter half of the 20th century, new information began to emerge that challenged the traditional view. Scientists on Earth began finding rugged organisms thriving in harsh conditions that were off-limits to most other creatures. Meanwhile, images beamed back by robotic probes in space revealed that other moons within our solar system were much more interesting geologically—and perhaps biologically—than our own.
However, beginning a decade ago, planets discovered around other stars began to reveal a diversity of planetary systems that was beyond expectations.
Originally posted by Rasobasi420
Of course my firt thought goes strait to the possability of life existing on these stars' surrounding planets. Who knows?
Originally posted by apc
How much of that though is just noise in the light amps?
However that is an interesting experiment. I'll have to try that some time I'm in an area free of light pollution.
Originally posted by EarthUnificationFrontier
It seemed very idiotic and ironic to me how so much is dedicated to space exploration and the search of knowledge of outter space, when so little is known about the depths of our oceans, lands, undiscovered species of animals, the nature's secrets etc.
Why thrive to learn about the outside when we don't even know everything about our own backyard??