Because of this 1.4 ratio, astronomers use Type Ia supernovae as "standard candles" to measure distances in the universe. The white dwarf absorbs the mass of a colliding nearby neutron star to increase to a mass of 1… The main difference (as in historical origin of the name) is Type 1 do not have hydrogen lines in their spectrum, Type 2 do. Internal and external explosion of a star, catalzyed by the collapse of the core of a massive star. Almost all high mass stars will become Type 2 supernova. The signature characteristics of a Type 2 supernova inclue an abundance of hydrogen and a plateau in the light curve Bright as an entire galaxy. Type II supernovae • This type of supernova has a lot of hydrogen and helium in its spectrum. Historically, supernovae are divided into types I and II because of the presence of hydrogen in the spectrum, that is, the light emitted in a given time. The reason for the spectral difference is due to a difference in origin: Type 1 supernovae are caused by a white dwarf (no hydrogen) suddenly passing the Chandrasaekar mass limit and turning into a neutron star. Since they know how much energy it … Type I supernovae consist of explosions of white dwarf stars composed primarily of oxygen and carbon. Type I and Type II Supernovae Supernovae are classified as Type I if their light curves exhibit sharp maxima and then die away gradually. The maxima may be about 10 billion solar luminosities. Type I and Type II supernovae have some characteristics in common while others are vastly different. There are two types of supernovae, type 1 and type 2. Type 2. Type II supernovae have less sharp peaks at maxima and peak at about 1 billion solar luminosities. Very different but equal energy. Type 1 supernova occurs when two binary systems of stars orbit near each other closely.

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