There is a tremendous amount of scientific exploration ongoing regarding STARDUST, a fraction of all Cosmic Dust grains reaching our planet Earth every day.
At first sight many things may appear just simple, just stardust originating from exploding stars, how difficult can it be? Until you start to study things in more detail.
Then it appears that just stardust can be distinguished by it's location, as intergalactic dust, interstellar dust, interplanetary dust ( including comet dust, asteroidal dust ), circumplanetary dust, and more.
Although all cosmic dust grains are tiny, between 0.1 pg and 0.1 g, it can be collected with stratospheric airplanes, from ice masses, from deep sea sediments, from meteorites, or for example, using specific space missions.
Then, studying some more detail, it appears that cosmic dust may contain heavy metals, isotopes, polycyclic hydrocarbons, possibly connected to the formation of more complex organic molecules, and the origin of life as we know it.
All of us contain elements, like calcium, iron, phosphorous, once formed by nuclear fusion reactions in distant stars, so , without stardust we as human beings, and life as we know it, would not exist.
As our entire solar system, and life, once started as just dust, its good to know that our planet Earth will again return to dust in the distant future, once our own Sun transitions to it's red giant phase, and will consume our planet. Dust to dust.
All things appear simple at first sight, until you take a closer look.
For decades I’ve been very interested in anything related to our Universe, and the origin of our human consciousness, our role as observers and trying to make sense of it all.