Heavy Rain in Dubai 2024

Oumuamua is misleading scientists again

Experts doubt it could be a "nitrogen iceberg"🤷🏻
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The Oumuamua space object is the subject of heated debate among astronomers. Some suggest it's part of exo-Pluto, others that it's a giant asteroid sent by another civilization. And a new study suggests that Oumuamua definitely cannot be a nitrogen iceberg.

Galaxy R5519 shaped like a ring, surrounded by a scattered halo

A void with a diameter of 30 thousand light years (about a third of the Milky Way's diameter) lies in its center.

As a result, the radius of the ring galaxy is 1.5-2.2 times larger than that of the Milky Way, with almost the same mass.

Aqueduct of the Mexican city of Chihuahua. Built in 1685, it is still in operation.

He (crab) knows how to have fun

🤣

Just LOL
Happiness starts with a Smile

Earth Day

Dear The Guardian,
Trust you are doing well.

I don't understand why you have to poke your nose everywhere? Did we ask you why the United Kingdom still has a king and why you had to change 3 Prime ministers in a span of 3 months? Did we ask you why your economic growth is negative? Did we ask you why the UK only country seeing recession? Did we?

Are you not the same country which looted 57 trillion dollars from my country? Are you not the same country which took our food and funded your army in the second world war, which killed nearly 3 million civilians during the Bengal Famine? And now you are teaching us democracy? Where was democracy when you ordered the Jallianwala massacre.

I suggest you focus on your economy and your government. Don't you remember how your country thanked an Indian company for ordering airplanes?

Get out of the superiority complex. We don't need lessons of democracy from a country which invaded half of the world and made them a colony. Please!

Warm Regards,
An Indian.

Unique photo 🛰

Astronaut Franklin Musgrave repairing the Hubble Space Telescope in outer space, 1993 🎞

This mission demonstrated the ability to repair satellites directly in orbit.

The life of a star is determined by its mass

Massive stars have a short life, ending in a supernova explosion or the formation of black holes.

Smaller stars live longer, ending their lives as white dwarfs.

The Cat's Eye Nebula is a planetary nebula formed after the death of a star with a mass approximately equal to that of the sun.

Vagabonds in Space

In the endless expanse of the Universe, orphan planets, a.k.a. tramps, or alien planets, fly in the darkness and silence. Once many of them had their own star. But these planets have gone out of orbit and now wander in space in sad loneliness.

✔️In spite of their seeming elusiveness, astronomers have been able to locate several distant planets thanks to the method of gravitational microlensing.

In September 2020, the first Earth-mass orphan planet, OGLE-2016-BLG-1928, was discovered in the Milky Way Galaxy, unconnected to any star.

Blades of African tribes

African tribal blades were once formidable weapons against colonizers and neighbors. Nowadays these swords and cleavers are either commonplace tourist souvenirs or the object of fascination for collectors of knives or Africanists.

A cosmic object with a mass of 66 billion solar masses!

It seems unbelievable, but such an object does exist - in the constellation of the Hound Dogs. This object is a heavy supermassive black hole, which is the center of the quasar TON 618.

Luminosity of the quasar is 140 trillion times more than the solar! It is one of the brightest objects in the known universe. But we cannot see it through the telescope with our eyes anyway - the quasar is 10.5 billion light years away from us.

Do all spiral galaxies have a black hole in the middle?

Nobody knows this for sure, but it is likely that most spiral galaxies contain a supermassive black hole, and sometimes more than one.

There are two reasons for our uncertainty. First, we physically cannot survey all spiral galaxies in the Universe.

Second, theoretically, galaxies are not obliged to have a black hole at their center - their stars will be held together as it is.

Likewise, there is clear evidence that black holes may have been very important, if not obligatory, for the formation of galaxies in the early Universe. In that case not only in the middle of spiral galaxies, but also in all other galaxies there could be compact supermassive objects.

There were 2,666 artificial satellites in Earth orbits in the summer of 2021, of which 154 belong to the U.S. military, about 100 to the Russian military, and 63 to the Chinese military.

Exoplanet Janssen

An exoplanet is located in the planetary system of the sun-like star 55 Cancer A in the double system 55 Cancer (HD 75732).

The exoplanet orbits the sun-like star.
The planet is very close to its star, and always faces one side of it. The period of orbit around the star is 17 hours.

The surface temperature reaches 2400°, causing the side facing the star to be a molten surface.

How to find the brightest star in the sky?

Sirius is the brightest star in the night sky. Although its luminosity is 25 times the luminosity of the Sun, it is by no means a record in the world of stars. High apparent brilliance of Sirius is due to its relative proximity.

Sirius can be seen from any region of the Earth, except for the most northern regions. Sirius is 8.6 solar years away from the solar system and is one of the closest stars to us.

Diving Bell Ship - Working Underwater Without Getting Wet

A Diving Bell Ship is a boat that helps people work underwater without getting wet. It has a special room that goes down into the water. Air is pushed into this room to push the water out, so people can do their work dry.

#boat #underwater #diving #ship #science