Paul Revere by Cyrus Dallin, North End, Boston



Sunday, April 10, 2016

Sunday Science Blog

Half Lava and Half Rock, 5 Cancri E Might Be The Weirdest Exoplanet Ever Discovered 

Strange world is just 40 light years away.

Why might you want to visit super-earth Cancri 55 e? Its extremely hot climate would be a deterrent, and fresh lava flows might be common. 

Discovered in 2004, the planet Cancri 55 e has twice the diameter of our Earth and about 10 times Earth's mass. The planet orbits its 40 light-year distant Sun-like star well inside the orbit of Mercury, so close that it is tidally locked, meaning that it always keeps the same face toward the object it orbits -- like our Moon does as it orbits the Earth. 

Astronomers have recently measured temperature changes on this exoplanet using infrared observations with the Spitzer Space Telescope. Given these observations, an artist created the featured video with educated guesses about what one revolution of Cancri 55 e might look like. 

Depicted are full phase, when the planet is fully illuminated, and new (dark) phase when it passes near the line of sight to Earth. The illustrated red bands on the Cancri 55 e indicate bands of lava that might flow on the planet. 

A recent density determination for 55 Cancri e show that this exoplanet is not made primarily of oxygen, as are the inner planets in our Solar System, but rather of carbon. Therefore, one reason to visit Cancri 55 e might be to study its core, because this planet's great internal pressure might be sufficient to make the carbon found there into one huge diamond.


Infidel753 said...

If the planet is mostly carbon, the surface rock may be mostly graphite. There would be lava flows of, basically, molten pencil lead.

There are some strange worlds out there. It will be a while before we can look at them up close, though. Forty light years is nearby in galactic terms, but it's more than sixty thousand times as far away as Pluto -- which the New Horizons probe took almost ten years to reach.

anymouse said...

I really love the rendition of this exoplanet but I suspect the actual planet is even more strangely beautiful.

Anonymous said...

What a crime it will be to allow man to infest the universe with his destruction, hate, and murder. Maybe we will be different by the time we figure out speed of light space travel.