SpaceX to start accepting dogecoin as payment 💰

Since January of this year, payment in dogecoin began to be accepted at the Tesla online store, but Musk did not specify when exactly this opportunity will open at SpaceX.

After his Twitter message, the value of dogecoin expectedly jumped 📈

The Cat's Eye Nebula (also known as NGC 6543 and Caldwell 6)

This is a planetary nebula in the northern constellation of the Dragon, discovered by William Herschel on February 15, 1786.

It was the first planetary nebula, which spectrum was studied by an English amateur astronomer.

Schwarzschild radius.

The radius, to which a body must be compressed, so that light from it cannot escape into space.

For the Sun it is about 3 km, while for the Earth it is only 0.884 cm - the ball in the photo. If you compress the Sun and the Earth to these or smaller radii, its light will not escape.

The Schwarzschild radius can be calculated for any body. The smaller the mass of the body, the smaller the Schwarzschild radius.

What happens if you scream in space?

As soon as you open your mouth, the air in your lungs is instantly sucked out. You'll hear the air go out of your body instantly. That will be your last exhalation.

That's how dangerous this cosmic world is.

Black holes absorb objects in different ways

They can slowly pull gas from a star's envelope and gradually destroy it until fusion stops in it. Or a star gets close enough to the event horizon of a black hole, the latter can tear it apart and "swallow" it in pieces. Such a phenomenon is called a "tidal collapse event.

This video shows how a black hole tears a star from beginning to end exactly according to the tidal destruction scenario.

Astronomers find out why Uranus and Neptune are different colors

Neptune and Uranus share much in common: they have similar masses, sizes and atmospheres, but the ice giants' appearance differs markedly. Neptune is blue in the visible spectrum, while Uranus is a pale shade of blue.

Based on observations of Uranus and Neptune by ground-based and space-based telescopes, astronomers built a model of their atmospheres, which showed that the difference in the visible color of the planets is due to the thickness of concentrated haze.

The newly developed model suggests that the layer of concentrated haze present on both planets is thicker on Uranus than on Neptune, and "bleaches" it more.

The northern cap of Mars

In midwinter, the polar caps occupy the surface up to 50° latitude. Not melting, the residual parts of the caps are formed from thick layered deposits.

All footprints and footprints of the moon rovers will remain on the surface of the Moon forever

Forever! Since the Moon has no atmosphere and therefore no wind.

An impressive new image from the Hubble telescope shows the galaxy NGC 5585

It lies in the constellation Ursa Major and is 28 million light-years from the Sun.

It is rather difficult to see details of NGC 5585 structure on the photo. But if to look closely, you can still see the faint outlines of its spiral arms. In some places, they are decorated with regions of active star formation.

The Hubble image also displays the core of NGC 5585. It shows traces of a lintel.

Is it realistic to take images of the cosmos from the comfort of your own home?

Capture Solar System objects with consumer cameras and lenses, and with amateur telescopes, without having a home copy of the Hubble telescope? Yeah!

Well, as an example, here are pictures of some of the cosmic objects taken with an amateur telescope.

Looks pretty good.😏

The InSight mission team released the final selfies of the vehicle

The selfies give a vivid picture of the spacecraft's desperate power situation. Its casing and solar panels are covered with a thick layer of dust. Thanks to it, InSight now generates ten times less power than it did immediately after landing on Mars in late November 2018.

In an effort to save energy and maximize Insight's lifespan, engineers began gradually shutting down the vehicle's systems and instruments, including its manipulator, which was used to take self-portraits.

Why is the starry sky revolving, but the Polaris is stationary?

The fact is that the rotation of the Earth around its axis is accompanied by the rotation of the axis itself. This effect is called precession. The precession cycle is about 28,000 years and is also known as the Platonic year.

That is, a fixed point in the starry sky also moves in a circle, but oh-so-slowly. A similar fixed point in the southern hemisphere sky is not so lucky and there are no bright stars nearby. The constellation Southern Cross is usually used for primitive navigation.

Elon Musk shared a photo of the Falcon 9 rocket after launch

This rocket sent 59 small satellites on a ridesharing mission called Transporter 5.

The special feature of this mission was the simultaneous launch of multiple satellites for different customers.

What methods of protection could be used against lunar dust adhering to a spacesuit?

Since the Moon has no atmosphere, no precipitation, no wind, no mechanical movements of lunar surface particles, there is no and cannot be dust formation as a physical phenomenon.

And that dust, which can be formed as a result of human activity by astronauts, will be removed as it is forming by one of the methods used by astronauts on orbital flights in space, or by the creation of antigravity.

That type of cloud is called a "thunderstorm collar”

These low, horizontal, trumpet-shaped clouds are quite rare. A thunderstorm collar may form near an incoming cold front.

If a downward flow of air from an incoming storm causes warm, moist air to rise, it cools below the dew point and forms a cloud.

Here is the planet Kepler-10b with lava oceans on its surface

The temperature on the planet's surface reaches 1,400 degrees Celsius.

Under the influence of such a high temperature, the rocks on the planet's surface melt, merge into vast areas, and become enormous oceans.

Taste buds malfunction in space

Astronauts have fluid redistribution in their bodies, so they lose their sense of taste.

Most astronauts suffer from food that seems incredibly bland and even tasteless, so they begin to have a real craving for spicy and sour foods.

Solar system has its own tail

Most similar to the tail of a comet, the only difference being that this one is shaped like a four-leaf clover. It's called a heliotail. Nothing was known about it for the simple reason that the tail consists of particles invisible to traditional instruments.

The heliotail stretches 13 billion kilometers from the edge of the Solar System. Its particles are scattered in all directions at a speed of 1.6 million kilometers per hour.

Blood Moon

On the night of May 15 to 16, a rare phenomenon, the blood moon, could be observed in Europe, the United States, South America and the African continent.

The blood moon comes only during a total lunar eclipse and only during a full moon. When the Earth stands in a straight line between the Sun and the Moon, it obscures the sunlight and the satellite is caught in the circle of its shadow.

Before it turns red, the Moon takes on a beautiful copper hue. All because sunlight scatters in the Earth's atmosphere and the rays of the red spectrum reflect off the Moon's surface.

Another total lunar eclipse is expected this year, on the night of November 7 to 8, but it won't be possible to see it in Europe.

Fire in Space.

On July 18, 2014, astronaut Reid Wiseman managed to produce a jellyfish-like fire sphere in an experiment. The results of his experiments could lead to better engines on Earth.

Shots of the planets in our Solar System in their actual proportions of linear size

Enlarge the photo and see how tiny our home planet is.

Test-driving a lunar rover during the Apollo 17 mission in December 1972.

Oh yeah, not only were there people on the Moon, but also a real lunomobile!