লক্ষ্য করুন: এই এন্ট্রির অনুবাদ বর্তমানে মান পর্যালোচনার অধীনে রয়েছে, তাই কিছু বিষয়বস্তু সাময়িকভাবে শুধুমাত্র ইংরেজিতে প্রদর্শিত হচ্ছে।
এই এন্ট্রিটি এখনও আপনার ভাষায় অনুবাদ করা হয়নি, তাই নিচে মূল লেখাটি দেখানো হচ্ছে।
biosignature
This term is primarily used in astrobiology and planetary science to describe a "smoking gun" for life. It differs from a "biomarker" in that a biosignature is often sought in the context of remote sensing or the study of extraterrestrial environments, whereas biomarkers are more frequently associated with terrestrial biological samples or medical diagnostics.
Because a biosignature is an indicator rather than a direct observation of a living organism, scientists distinguish between "strong" and "weak" biosignatures. A strong biosignature is a phenomenon that cannot be explained by any known abiotic process, while a weak one could potentially be produced by geological or chemical reactions without the presence of life.
Meanings
Examples
The telescope is designed to detect a biosignature in the atmosphere of distant exoplanets.
Could this strange chemical pattern be a genuine biosignature?
Scientists are searching for a biosignature that proves life once existed on Mars.
The presence of methane can sometimes be interpreted as a potential biosignature.
We need more data before we can confirm this as a definitive biosignature.
The rover analyzed the soil samples for any trace of a biological biosignature.
A strong biosignature would change our entire understanding of the universe.
They debated whether the signal was a geological fluke or a true biosignature.