Why do astronauts not fly to the dark side of the Moon?

✨The point is that there is no radio communication with Earth on the other side of the Moon.
--One solution to this problem is to use a constellation of satellites to send a signal, though this approach is expensive and difficult.

‼Sending people to the Moon without constant communication is an unreasonable risk✨

#AstroInfo
👉 @AstroMechanics

The Solar System has its own tail

✨It looks most like the tail of a comet. We call it the heliotail. Nothing was known about it for the simple reason that the tail consists of particles invisible to traditional instruments.

✔️ The heliotel stretches 13 billion kilometers from the edge of the solar system✨

The Universe has the same temperature everywhere (-454.756°F)

✨A snapshot of the Cosmic Microwave Background – heat left over from the Big Bang – when the Universe was just 380,000 years old, as seen by the Planck Telescope. It shows tiny temperature fluctuations that correspond to regions of different densities: the seeds that would grow into the stars and galaxies of today✨

#UniverseTemperature
👉 @AstroMechanics

Why has Mars lost its atmosphere?

✨Nowadays, Mars is a cold and barren desert. Perhaps it was the loss of the atmosphere that caused such a change.

Unlike Earth, Mars does not have a strong magnetic field protecting the red planet from the flow of solar charged particles.

The solar wind crashes unhindered into the upper atmosphere of Mars and pushes ions into space✨

#Mars
👉 @AstroMechanics

#Astrowallpaper
👉 @AstroMechanics

When is Mars to become a habitable planet?

✨The problem is that Mars it cannot hold a dense atmosphere due to its low gravity.

As a consequence, any attempts to make Mars similar to Earth must involve either constant feeding of its atmosphere, or a substantial (several-fold) increase in its mass. Both options are far from being realized.

In general, this cannot happen in the next centuries✨

#Mars
👉 @AstroMechanics

Why aren't the planets falling on the Sun?

✨Most of us are aware that the Sun contains 99% of the total solar system mass and everything in it revolves around the Sun.

Based on the law of universal gravitation, all bodies are attracted to each other: such as the Sun and Earth, the gravitational force is about 3.35×10^22N. And at first glance, with such a huge force, the bodies would have to come closer to each other, or rather, our planet would have to fall on the Sun.

As well as planets do not fall into the sun because they are moving too fast in the tangential direction. As they fall toward the sun they travel tangentially just enough that they never get very close to the sun. They fall around it, in effect✨

#planetsinfo
👉 @AstroMechanics

Planet Tajikistan

✨There is a dwarf planet in the solar system, which is located in the region between Mars and Jupiter, was named "Tajikistan”.

It was named after the Tajik scientists who contributed to the development of astronomy✨

#Tajikistan
👉 @AstroMechanics

Roughly 5-6 tons of meteoritic material falls to Earth per day☄

✨It would seem to be a huge figure. But most meteorites burn up before they reach earth: When a meteorite enters the atmosphere, its speed can reach 11 to 72 km/sec. Due to the friction of the air, it ignites and resembles a bright fireball.

Sometimes, the internal structure of the meteorite is heterogeneous and unstable: then it explodes in the air, and its debris falls to the ground. This phenomenon is called a meteor shower✨.

#Meteorite
👉 @AstroMechanics

Firstpost: How NASA plans to destroy International Space Station in 2031.
https://www.firstpost.com/world/how-nasa-plans-to-destroy-international-space-station-in-2031-10390891.html

The Tribune: James Webb Telescope images star twinkling 18 times.
https://www.tribuneindia.com/news/schools/james-webb-telescope-images-star-twinkling-18-times-371541

Interesting Engineering: NASA's Mars rover captures clouds drifting across the Martian sky.
https://interestingengineering.com/mars-rover-martian-clouds

CNBC: Scientists discover third rock around alien sun.
https://www.cnbc.com/2022/02/20/scientists-discover-third-rock-around-alien-sun.html

Space.com: Making spaceflight history: John Glenn orbited Earth 60 years ago today.
https://www.space.com/john-glenn-first-american-orbital-flight-60-year-anniversary

Digital Trends: Hubble captures epic view of three galaxies merging into one.
https://www.digitaltrends.com/news/hubble-triple-galaxy-merger/

A hidden supermassive black hole in a dwarf galaxy

✨It was discovered in the Constellation Hound Dogs - in the dwarf galaxy Mrk 462, about 110 million light years away.

Discovered black hole has a mass of about 200 thousand solar masses. It is one of the smallest supermassive black holes. The hole was found by NASA's Chandra X-Ray Space Observatory, launched in 1999.

The agency called the discovery one of the first cases where a heavily hidden supermassive black hole was found in a dwarf galaxy✨

#Mrk462info
👉 @AstroMechanics

Earth Rotates Faster and Faster Every Year🌍

✨Scholars have analyzed that the current speed of the Earth's rotation has hit its maximum for the past 60 years. If it keeps going this way, estimated and actual time may differ by 0.9 seconds by 2026.

And then, we would have to turn down Earth time for the first time

#Earth
👉 @AstroMechanics

Why are this galaxies so thin?

✨Many disk galaxies are actually just as thin as NGC 5866, pictured above, but are not seen edge-on from our vantage point. One galaxy that is situated edge-on is our own Milky Way Galaxy. Classified as a lenticular galaxy, NGC 5866 has numerous and complex dust lanes appearing dark and red, while many of the bright stars in the disk give it a more blue underlying hue. The blue disk of young stars can be seen extending past the dust in the extremely thin galactic plane, while the bulge in the disk center appears tinged more orange from the older and redder stars that likely exist there✨

#Galaxy
👉 @AstroMechanics

What is the colour of Universe?

✨This question came up when trying to determine what stars are commonplace in nearby galaxies. The answer, depicted above, is a conditionally perceived shade of beige. To determine this, astronomers computationally averaged the light emitted by one of the larger samples of galaxies analyzed: the 2,00,000 galaxies of the 2dF survey. The resulting cosmic spectrum has some emission in all parts of the electromagnetic spectrum, but a single perceived composite color. This color has become much less blue over the past 10 billion years, indicating that redder stars are becoming more prevalent. And it was finally named as cosmic latte✨

#UniverseColor
👉 @AstroMechanics

Europa is the celestial body with the smoothest surface in the solar system🌑

✨Jupiter's satellite is entirely covered by an ocean with a thick crust of ice on its surface. Underneath that ice lies roughly 2-3 times as much water as on our planet.

Some scientists believe the ocean waters of Europa may be hot enough for complex life to develop on the satellite✨
#Europa
👉 @AstroMechanics

Prague Astronomical Clock Chimes

✨The astronomical clock face was created in Prague back in 1410. What is surprising, the clock is the third oldest astronomical clock in the world. And it still works today.

⏱The dial shows Babylonian, Central European, Old Bohemian and sidereal time. Other indications show the position of the Sun among the zodiac signs and the current lunar phase✨
#PragueChimes
👉 @AstroMechanics