Exponents notes

Decomposition of Common material

Layers of the Mother Earth

How Rice is Grown in India by a Foreigner

Why isn't Mercury the hottest planet? 🤔

The fact is that Mercury's low mass and its proximity to the Sun prevents the planet from holding an atmosphere.

It's the atmosphere that helps planets keep heat from escaping into outer space. Without an atmosphere, Mercury gives off a lot of heat into space instead of sharing it with its darkened side.

The hottest planet is Venus, the second planet from the Sun. It has a dense atmosphere that envelops it, keeping it warm.

5 Axis milling machine

The Moon appears to us as a pretty bright body 🌔

But in fact, its surface albedo (so its reflectivity is called) is only 13%, which is almost three times less than Earth's albedo.

That's why in almost all photographs the brightness of the Moon is increased to make it more contrasting.

Subterranean oceans on moons of exoplanets

In our search for extraterrestrial life, we have so far mainly looked at terrestrial planets, where temperatures are between freezing and boiling point of water.

But if we take our own solar system as an example, the moons look more promising than the planets. Enceladus, Europa, and about six other satellites of Jupiter, Saturn, Uranus, and Neptune may have subsurface oceans.

They all live well outside the traditional habitable zone - their surface is severely frozen, but tidal interaction with their host planet warms their interior region.

What can be seen in the Andromeda Galaxy through a telescope?

This cosmic lady is one of the most distant objects that humans can see with the naked eye. And through a telescope, it is realistic to observe several curious objects already inside the galaxy.

In small telescopes away from the city lights we can see bright satellite galaxies M 32 and M 110, dust bands, some globular star clusters and the star-forming region NGC 206.

With more powerful instruments, the structure of the galaxy is already observed as more detailed. We can see the star-like core, not only globular and scattered star clusters, but also individual stars, such as the AF Andromeda, a bright blue pulsating hypergiant.

In telescopes with a lens diameter of 500 mm or more, you will be able to see the nearest companions of Andromeda - the dwarf spheroidal galaxies Andromeda I, II and III.

Trigonometry Application in Tom and Jerry

Metric measurement system

Substraction of fractions

UNESCO World Heritage sites

Rivers and Dams

Constitution timeline

Strange things take place on Mercury

Mercury is one of the least explored planets in the solar system. Still, partly due to its proximity to the Sun, and partly due to the peculiarities of the planet itself (the strong attraction of the Sun and the weak attraction of Mercury).

For example, with the slightest pointing error the Hubble telescope will focus on the Sun and be knocked out by it. And spacecraft require complex maneuvers.

Nevertheless, scientists have obtained a lot of interesting data. Such as, that at some points on the surface you can watch the Sun rise and set twice 🙂

In the sky of Mercury, it describes a loop: it rises, stops, turns back and sets. Then it rises again for a long time. And then repeats the trick at sunset.

The most spectacular globular star clusters seen in our sky 🌌

M13 or "The Hercules Globular Cluster" is the brightest and most spectacular globular star cluster in the northern sky, as well as one of the most well-studied. Even with binoculars under good viewing conditions, you can see individual stars in the cluster.

The M2 cluster is also one of the most saturated and compact globular clusters of indescribable beauty in the constellation Aquarius. M5 is one of the largest and oldest in our Galaxy, a rich "swarm" of stars of different spectral classes.

Global Warming 😢

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