  Chandrasekhar made the startling discovery about nine decades back that the
mass of compact object white dwarf has a limiting value, once nuclear fusion
reactions stop therein. This is the Chandrasekhar mass-limit, which is
$\sim1.4M_\odot$ for a non-rotating non-magnetized white dwarf. On approaching
this limiting mass, a white dwarf is believed to spark off with an explosion
called type Ia supernova, which is considered to be a standard candle. However,
observations of several over-luminous, peculiar type Ia supernovae indicate
that the Chandrasekhar mass-limit to be significantly larger. By considering
noncommutativity among the components of position and momentum variables, hence
uncertainty in their measurements, at the quantum scales, we show that the mass
of white dwarfs could be significantly super-Chandrasekhar and thereby arrive
at a new mass-limit $\sim 2.6M_\odot$, explaining a possible origin of
over-luminous peculiar type Ia supernovae. The idea of noncommutativity, apart
from the Heisenberg's uncertainty principle, is there for quite sometime,
without any observational proof however. Our finding offers a plausible
astrophysical evidence of noncommutativity, arguing for a possible second
standard candle, which has many far-reaching implications.
