Alien Planet’s Size Measured Like Never Before


http://earthchangesmedia.com/alien-planets-size-measured-like-never-before
Astronomers have made the best-ever measurement to date of the radius of an alien world.
Using observations by NASA’s Kepler and Spitzer space telescopes, researchers determined that the exoplanet Kepler-93b is 1.48 times the size of Earth, confirming its status as a super-Earth — a world s…

Astronomers have made the best-ever measurement to date of the radius of an alien world.

Using observations by NASA’s Kepler and Spitzer space telescopes, researchers determined that the exoplanet Kepler-93b is 1.48 times the size of Earth, confirming its status as a super-Earth — a world slightly larger than our own — and allowing scientists to conclude that the planet is very likely composed of iron and rock.

“With Kepler and Spitzer, we’ve captured the most precise measurement to date of an alien planet’s size, which is critical for understanding these far-off worlds,” lead author Sarah Ballard, of the University of Washington in Seattle, said in a statement. “The measurement is so precise that it’s literally like being able to measure the height of a six-foot-tall person to within three-quarters of an inch — if that person were standing on Jupiter.” [The Strangest Alien Planets]

Kepler-93b, which lies about 300 light-years away, orbits a star that’s about 90 percent as wide and massive as the sun. The rocky planet circles its host at only one-sixth the distance Mercury orbits the sun, resulting in a likely surface temperature of around 1,400 degrees Fahrenheit (760 degrees Celsius).

Ballard and her team used a new observing technique developed for Spitzer, combined with frequent observations from Kepler, to confirm that Kepler-93b is indeed a planet rather than a false positive.

The two telescopes noted how much the star dimmed as the planet crossed its face. In the visible-light wavelengths observed by Kepler and the infrared wavelengths captured by Spitzer, the signal remained the same.

In addition, Kepler studied the stellar dimming caused by seismic waves within the star, making it one of the lowest-mass targets of astroseismic study. These measurements allowed for a more precise computation of the star’s radius, which in turn led to a more refined solution for the planet’s width, researchers said.

The combined data reveal that Kepler-93b boasts a diameter of approximately 11,700 miles (18,800 kilometers), with an error of only about 150 miles (240 km) — the approximate distance from Washington, D.C., to Philadelphia.

Combined with Kepler-93b’s previously computed mass of approximately 3.8 times that of Earth, the refined radius allowed scientists to calcuate that the planet’s density is nearly twice that of Earth. This implies that iron and rock dominate the composition of Kepler-93b, researchers said.

The planet’s temperature and proximity to its star make it unlikely that Kepler-93b could hold on to gases at its surface. However, based on its physical measurements, Ballard and her team found a 3 percent chance that it could contain an extended atmosphere.

“Ballard and her team have made a major scientific advance while demonstrating the power of Spitzer’s new approach to exoplanet observations,” said Michael Werner, Spitzer’s project scientist.

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About Earth Changes Media w/ Mitch Battros

Mitch Battros is a scientific journalist who is highly respected in both the scientific and spiritual communities due to his unique ability to bridge the gap between modern science and ancient text. Founded in 1995 – Earth Changes TV was born with Battros as its creator and chief editor for his syndicated television show. In 2003, he switched to a weekly radio show as Earth Changes Media. ECM quickly found its way in becoming a top source for news and discoveries in the scientific fields of astrophysics, space weather, earth science, and ancient text. Seeing the need to venture beyond the Sun-Earth connection, in 2016 Battros advanced his studies which incorporates our galaxy Milky Way - and its seemingly rhythmic cycles directly connected to our Solar System, Sun, and Earth driven by the source of charged particles such as galactic cosmic rays, gamma rays, and solar rays. Now, "Science Of Cycles" is the vehicle which brings the latest cutting-edge discoveries confirming his published Equation.
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