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White dwarfs polluted with rocky debris shed light on exoplanets

Rocky material found in the atmospheres of two Milky Way white dwarfs hint at the chemical compositions of distant worlds. ....

United States , Keith Putirka , Monthly Notices Of The Royal Astronomical Society , University Of Warwick , California State University , Milky Way , Monthly Notices , Royal Astronomical Society , Abbigail Elms ,

Some volcanic hot spots may have a surprisingly shallow heat source

Mysterious hot spots of volcanic activity in the interior of tectonic plates just got a little stranger. ....

Pitcairn Islands , United States , Keith Putirka , Godfrey Fitton , Xiyuan Bao , California State University , University Of Edinburgh , Ascension Island , South Atlantic , South Pacific ,

Never-before-seen rocks found in these exoplanet graveyards

Researchers studying the atmospheres of white dwarfs have discovered previously unknown rock types which made up the exoplanets that once surrounded the stellar remnants. ....

United States , Keith Putirka , Siyi Xu , Astronomy Research Laboratory Noirlab , California State University , National Optical ,

Rocky Exoplanets Are More Diverse Than Previously Thought

According to new analysis, rocky planets found in other systems are much more diverse than previously thought. An astronomer named Siyi Xu from NSF’s NOIRLab and a geologist named Keith Putirka from California State University, Fresno, focused on rocky worlds that orbit nearby stars as well as “polluted” white dwarfs’ chemical compositions. Polluted white dwarfs. Read more » ....

United States , Keith Putirka , Siyi Xu , Nature Communications , California State University , Keck Observatory , Hubble Space , Hubble Space Telescope , White Dwarf , Space Amp Astronomy ,

Never-Seen-Before Rocks Discovered Among Destroyed Exoplanets

Astronomers have discovered that rocky exoplanets might be even weirder than previously thought. ....

United States , Keith Putirka , Siyi Xu , Nature Communications , California State University , Solar System , Milky Way ,