He's known for his work in stellar evolution, including the Chandrasekhar Limit. That is the dividing line between the mass of a star that has spent its nuclear fuel and will collapse into a white dwarf and one massive enough to go out with a bang - a supernova. It's about 1.4 times the Sun's mass.
On this day in 1967 - October 19th - the European Space Agency's (ESA) ExoMars arrived at Mars.
There were two parts to the mission. The Trace Gas Orbiter (TGO) was successfully inserted into orbit and is working as expected. However due to a systems malfunction, the experimental lander Schiaparelli crash landed on Mars.
We take forum safety very seriously here at BellaOnline. Please be sure to read through our Forum Guidelines. Let us know if you have any questions or comments!