Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
If we see a nebula by looking through a powerful telescope, how can we tell whether we are looking at the remnant of a supernova or at a planetary nebula?
A Supernova Remnant contains a Black Hole or a Neutron Star while a Planetary Nebula contains a White Dwarf.
Also, Supernovae Remnants are likely to have great velocities, so Doppler is another plausible choice. - Not through telescope though.