Did you know?

Hello everyone !

About half of the cowboys were people of color.

It is a little-known reality of the conquest of the West: at the end of the 19th century, 45% of cowboys were black, Mexican, mestizo or Indians.

In the 1930s, one of them, Bill Pickett, even became a star.

He invented bulldogging, a technique that involves jumping off your horse to control a cow - or even a bull - by grabbing it by the horns!

The rodeos of the time made it an official event. And Bill Pickett, who attended, was dubbed the "black demon."

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Hello everyone !

The largest star in the Universe is currently being absorbed by a black hole.

For the first time, a black hole has been caught ripping and swallowing a star that's too close.

Scientists, who until now had only witnessed the aftermath of such events, claim that the observation highlights "relativistic jets", shards of matter that spring up at almost the speed of light.

At the center of virtually all large galaxies are super massive black holes.

These monsters, which are millions to billions of times the mass of the sun, can tear through passing objects, gravitational pulling at the stars in gigantic versions of how our moon pulls over Earth's oceans to generate tides.

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Hello everyone !

There is a planet that could be made entirely of diamonds.

New research by scientists at Yale University suggests that a rocky planet twice the size of Earth orbiting a nearby star is a diamond planet.

“This is our first glimpse of a rocky world with fundamentally different chemistry from Earth,” said lead researcher Nikku Madhusudhan, Yale postdoctoral researcher in physics and astronomy.

"The surface of this planet is probably covered with graphite and diamond rather than water and granite."

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Hello everyone !

The galaxy is an island in a stream of stars.

The Milky Way absorbs galaxies that come a little too close.

Over time, scientists who have studied our galaxy have detected two dozen clusters of stars, afterglow of galaxies.

These rivers of ghostly stars were formed when the very powerful gravity of the Milky Way dismantled the smallest galaxies.

During the last Congress of the American Astronomical Union, a team from the Dark Energy Survey, an international program seeking to map hundreds of millions of galaxies in order to better understand the nature of dark energy, announced the detection 11 additional star currents, some of which bear Aboriginal names.

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Hello everyone !

We hang out with old stars!

The Milky Way is also surrounded by more than 150 ancient groups of stars, some of which are among the oldest in the universe.

Called globular clusters, these conglomerates of primordial stars live in the orbit of the Milky Way and its galactic center.

Each of these clusters includes hundreds of thousands of stars.

In addition, dozens of galaxies

satellites accompany the Milky Way in its course; some are difficult to observe, but the Small Cloud and the Large Magellanic Cloud appear every evening in the southern hemisphere.

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Hello everyone !

We are surrounded by a black halo.

The Milky Way is nested in a cluster of dark matter much larger and more massive than the galaxy itself.

In the late 1960s, astronomer Vera Rubin deduced the presence of dark matter in the periphery of galaxies by studying the speed of rotation of stars in spiral galaxies.

She observed that the stars near the outskirts of Andromeda were moving at a speed that should have sent them to the far reaches of the universe.

And yet they stayed in their orbit, which meant that some sort of cosmic glue held them together.

This "glue", we now know, is dark matter.

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