Astronomers have made an exciting discovery: a potentially habitable rocky planet called HD-137010 b. It’s about 150 light-years away and resembles Earth, but it’s much colder.
According to a recent study, HD-137010 b is slightly larger than Earth, around 1.2 times its mass. It takes about 355 days to orbit its star, which means its year is similar to ours.
Research shows there’s a 51% chance this planet is in its star’s habitable zone, the area where conditions might allow liquid water to exist. This is critical because water is essential for life.
HD-137010 b orbits a K dwarf star, which is cooler and smaller than our Sun. These types of stars live much longer because they use their hydrogen slowly. In fact, HD-137010 might last longer than the current age of the Universe!
This discovery is significant. Researchers noted it as the first Earth-like candidate planet that transits a Sun-like star bright enough for detailed follow-ups. They initially found HD-137010 b using data from NASA’s retired Kepler space telescope through a method called the transit technique. This involves monitoring stars for dips in brightness caused by a planet passing in front.
So far, scientists have only seen HD-137010 b transit once. Confirming it as a planet will require years of observation, but early signs are promising. The future of observing these kinds of planets might rely on next-generation telescopes, such as the ESA’s PLATO.
Although HD-137010 b may be chillingly cold, with temperatures ranging between -68 to -85 degrees Celsius, there’s still a chance for a suitable atmosphere. Some researchers suggest that a CO2-rich atmosphere could allow for liquid water. However, if its conditions mirror Earth’s too closely, it might lead to a “snowball” state, making the planet completely covered in ice.
Interestingly, HD-137010 b could have siblings. Other planetary systems suggest that multiple planets might exist in its orbit, potentially creating a solar system-like setup.
The knowledge we gather from HD-137010 b can also provide insights into our own Earth’s past. At various points in its history, Earth experienced extreme cold spells, known as “snowball Earth.” So, while HD-137010 b seems inhospitable, it might not be completely out of the question for life.
This research highlights the importance of ongoing exploration and observation of distant worlds. Maybe one day, we’ll find that colder planets can support life, even if it’s not what we’ve traditionally expected.
For more details, check the study published in The Astrophysical Journal Letters.
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