Image courtesy of NASA/Jet Propulsion Laboratory (JPL)
Joel Kontinen
According to evolution the dwarf planet Ceres might have
been a flourishing planet and soon after its evolution the planet has been
habitable. Now it is cold and icy, but according to evolutionary thinking, it
may have been a flourishing planet after its formation.
Provided that intelligent design did not work, as intelligence
is needed to form a habitable planet.
A billion or so years into its evolution, the icy
dwarf planet Ceres may have had the right conditions to sustain life, which
indicates the solar system may be more habitable than we thought
The dwarf planet Ceres looks cold and dead,
but a billion or so years after its formation, it may have had a warm interior
that made it habitable.
Sam Courville at Arizona State University says he
can’t speculate on whether life ever arose on Ceres – but had this happened,
the dwarf planet’s past environment may have enabled that life to survive.
Previous research has indicated there could
be water ice and organic molecules on Ceres, pointing towards the
possibility of life. But in this study, the researchers focused on what these
alien life forms would have eaten. They considered microbes like those that
live in hydrothermal vents in Earth’s oceans and extract energy
directly from chemical molecules, rather than from consuming other organisms.
Could similar microbes have survived in the oceans of ancient Ceres?
The team modelled Ceres’s past on a computer, finding
that when it was between half a billion and 2 billion years old, pores close to
its hot core could have released fluids that then mixed with the colder water
in its oceans. That process could have delivered the chemical “food” that
microbes would have needed.
If we want to find evidence of past or current life in
our solar system, says Amanda Hendrix at
the Planetary Science Institute, we need to look to worlds like Ceres that have
– or once had – oceans.
Strikingly, the type of microbial life support that
the team identified could also have occurred on other Ceres-sized icy objects.
It may mean more planets than we expected could be habitable at some point in
their evolution.
“If Ceres was habitable in the past, then probably
there are tens of asteroids and moons that were also habitable in the past. And
if you can keep them hot, maybe [they are] still habitable today,” says
team member Joe O’Rourke, also at
Arizona State University.
Habitability thus might be “a natural consequence of
putting the right ingredients together, which seem to be the common ingredients
in the solar system”, says Courville.
But many details remain to be ironed out, even just
for Ceres. The researchers say their model would benefit from a precise
chemical analysis of minerals on the planet’s surface,
some of which may have been brought up by underground flows. But no spacecraft
that might be able to collect them has ever landed on Ceres.
Source:
Karmela Padavic-Callaghan 2025 Ceres may have been habitable at just half a billion years old | New Scientist 20 August