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Monthly Archive: March 2018

A New Extrasolar Planet is as Hot and Dense as Mercury, but 2.5 Times the Mass of Earth

In the course of searching for planets beyond our Solar System – aka. extra-solar planets – some truly interesting cases have been discovered. In addition to planets that are several times the size of the Solar System’s largest planet (Super-Jupiters), astronomers have also found a plethora of terrestrial (i.e rocky) planets that are several times the size of Earth (Super-Earths)

Hubble Finds a Galaxy with Almost no Dark Matter

Since the 1960s, astrophysicists have postulated that in addition to all the matter that we can see, the Universe is also filled with a mysterious, invisible mass. Known as “Dark Matter”, it’s existence was proposed to explain the “missing mass” of the Universe, and is now considered a fundamental part of it. Not only is it theorized to account for 26.8% of the Universe’s mass, it is also believed to have played a vital role in the formation and evolution of galaxies.

NASA’s Curiosity Rover Enjoys its 2000th Day on Mars

Since it landed on Mars in 2012, the Curiosity rover has made some rather startling scientific discoveries. These include the discovery of methane and organic molecules , evidence of how it lost its ancient atmosphere , and confirming that Mars once had flowing water and lakes on its surface . In addition, the rover has passed a number of impressive milestones along the way

About 2.3 Billion Years Ago, a Firehose of Oxygen was Released Into the Atmosphere

Billions of years ago, Earth’s environment was very different from the one we know today. Basically, our planet’s primordial atmosphere was toxic to life as we know it, consisting of carbon dioxide, nitrogen and other gases. However, by the Paleoproterozoic Era (2.5–1.6 billion years ago), a dramatic change occurred where oxygen began to be introduced to the atmosphere – known as the Great Oxidation Event (GOE)

Carnival of Space #554

This week’s Carnival of Space is hosted by Allen Versfeld at his Urban Astronomer blog. Click here to read Carnival of Space #554 . And if you’re interested in looking back, here’s an  archive to all the past Carnivals of Space

70,000 Years Ago a Nearby Star Messed With the Orbits Of Comets and Asteroids in our Solar System

70,000 years ago, our keen-eyed ancestors may have noticed something in the sky: a red dwarf star that came as close as 1 light year to our Sun. They would’ve missed the red dwarf’s small, dim companion—a brown dwarf—and in any case they would’ve quickly returned to their hunting and gathering. But that star’s visit to our Solar System had an impact astronomers can still see today.

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