Most ancient presolar grains: 7 billion y.o. stardust. Robert Zimmerman, BehindtheBlack,com

Jan 15, 03:42 AM
Image: Screen grab from a video of the Field Museum’s brilliant analysis of pre-solar material. 

See: An undated handout picture taken by Janaina N. Avila showing a scanning electron micrograph of a dated presolar silicon carbide grain, at https://www.dailysabah.com/science/2020/01/14/7-billion-year-old-stardust-inside-meteorite-oldest-solid-material-ever-found-on-earth
Robert Zimmerman, BehindtheBlack,com, in re:  From the surface of the planet Earth: In Murchison, Victoria, Australia, in 1969 a meteorite crashed in; it looks to be older than the Solar System. Stupendous date: “pre-solar grains” suspected to be older than the Sun. Amt of exposure to solar rays measures age: these are 4.6 to 4.9 billion years old; Earth is 4.5  Even found some grains that might be 7 billion years old.  The oldest material is fragile and tends to burn up. To study pre-Milky Way materials: obtain them from space.

Mars surface: Curiosity. Ganymede, a moon of Jupiter. Two Super-Earths: two stars abt 100 LY away with three planets orbiting; both planets potentially habitable.  Also, a rocky planet seven times the size of Earth.