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This is not an ordinary spatial photo: Hubble data represents 16 years, or 7,500 exposures in total, including more than 265,000 galaxies. But that's not all. Some of the galaxies in this image are so old that they go back almost to the beginning of the universe. This means that most of the light you see here is a tiny spec of starlight, the light of galaxies full of planets and black holes and a myriad of mysteries, running the universe for 13.3 billion dollars. years. Hubble is not just a telescope, it's a time machine.
You may not know it, but a satellite galaxy gravitates around our Milky Way, it's called the Great Magellanic Cloud. In this photo, you can see a section extracted from the LMC, a cluster of stars containing many stars called Cepheid variables. These stars darken and illuminate at regular intervals, and Earth astronomers can use them as a means to measure the distance to the galaxy, allowing us to better calculate the rate of expansion of the universe. .
The Gaia space telescope of the European Space Agency has a big job: mapping the cosmos. He sent to Earth some remarkable pictures of the space around us, but this image was not captured by Gaia. It's rather an image of Gaia herself. Scientists must be able to accurately determine which part of the sky is mapped by the craft. To do this, they must locate Gaia as he rotates around the Earth. Although we can not see the small space instrument, it is there among the scattered starlight.
These are human cells dotted with nanoparticles presented here in light green. NASA and the European Space Agency are studying the effects of space on the human body, including premature aging of cells and cardiovascular disease. By injecting these nanoparticles into the cells, scientists can observe the interaction of the enzymes that compose them in the space, hoping to find out more about the impact of the microgravity environment on the long-term health of astronauts.
This area on Mars is called Sisypi Cavi and is located near the South Martian Pole. (Cavi is actually a term describing steep side depressions.) If you look at the top of the cliff, you'll see active ravines that look like long ripples in the sand. These are created by wind and active geological processes. And in the middle of each depression are dunes that form almost mountainous structures from the Martian land.
Just when you thought Hubble had done so much recently, this wonder comes up: check out this amazing photo from a spiral galaxy called NGC 2903. Astronomers study disk galaxies like NGC 2903 because they also have black holes in their center. Through observation and study, they seek to better understand the relationship between star-filled galactic nuclei and the supermassive black holes that tend to form them. There is of course another advantage: pretty pictures!
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