Sometimes you gotta just laugh at science journalists. This genius is
claiming that Cassiopeia A's supernova remnant is a neutron star of 20
Solar masses! You gotta wonder how it's able prevent itself from
collapsing into a black hole without nuclear fusion?

Other than that, the article is okay, describes a newly formed neutron
star that still has an atmosphere of carbon on it. The carbon was
created from left over fusion reactions in an atmosphere of hydrogen and
helium on the surface of the neutron star even after it had gone supernova.

CBC News - Technology & Science - Canadian physicist IDs young neutron star
"Craig Heinke and his colleague Wynn Ho at the University of
Southampton, U.K., say that the remnant of the supernova Cassiopeia A is
a very young neutron star, 20 times heavier than the sun, but only 20
kilometres wide."
http://www.cbc.ca/technology/story/2...tron-star.html

Yousuf Khan