Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
Look at The dwarf planet Pluto and Titan, Saturn’s largest moons, have yet to puzzle astronomers James Webb Space Telescope JWST discovered a chemical signature on their surfaces that did not match any signature recorded in spectral databases. The researchers believe this is not a bug in the machine, but rather a sign of a compound whose identity remains a mystery — a mixture of substances that has not been studied in the laboratory, or even a compound whose chemistry has not yet been characterized.
The result is shown in A He studies Pending publication in the Journal of Astronomy and Astrophysics. Scientists have identified an absorption band centered at 5,113 micrometers on both Titan and Pluto, two worlds separated by billions of kilometers and with very different physical conditions. The signal appeared in observations made using two different instruments on the James Webb Space Telescope, leading the team to rule out the possibility that it was a calibration issue or some other type of technical error.
The key to this discovery lies in a technique known as spectroscopy. Each element or molecule interacts with light in a unique way, absorbing specific wavelengths and leaving a distinctive pattern, like a fingerprint. Over decades, scientists have compiled extensive catalogs of these spectral signatures to identify compounds such as water, methane, carbon dioxide, or ammonia found on planets and moons, as well as on other bodies outside the solar system.
In this case, the comparison did not yield any convincing matches. Moreover, at this stage, the discovery of a chemical signature that cannot be linked to a known compound is highly unusual. Therefore, knowing what happens on Titan and Pluto could become the new fundamental question for planetary science.
Researchers have already explored many possibilities. They examined laboratory spectra of ice and organic compounds that may be present on these worlds, including acetylene, benzene, chitin, and a family of molecules known as allenes. None of them exactly match the observed signature. The most likely explanation is that it is from a known compound existing in a physical state or a mixture that has not previously been studied in the laboratory, although the authors do not rule out the possibility that the signal comes from a substance whose chemistry has not yet been characterized.
The fact that the same sign appears in two different places makes the puzzle even more interesting. Titan has an atmosphere rich in nitrogen and methane with a surface pressure of about 1.5 bar – higher than that of Earth – as well as rivers and lakes of liquid methane and a temperature of about -180 °C (-292 F). Pluto, on the other hand, maintains a thin atmosphere of about 10 microbars (about 150,000 times less dense); It has an ice-covered surface composed of nitrogen, methane, and carbon monoxide. Temperatures reach approximately -235°C (-391°F).
