a) State why a white dwarf becomes a violent Type 1A supernova, instead of a gentle nova explosion, depending on where fusion restarts. b) Then, briefly explain why the Chandrasekhar limit allows astronomers to estimate distances far beyond what was possible with the old parallax method (like Tycho Brahe used). Part 2: a) Briefly cover the key difference between Type 1A and Type 2 supernovae. b) Finally, describe the situation that can lead to a "millisecond pulsar" (a neutron star which rotate over 500 times per second, not a normal pulsar). Reply to classmate: (4 points) Then, come back and respond to at least one classmate's post, or try your best to respond to their questions. Aim for 2 sentences of a thoughtful reply