Is it possible to fly into space in an airplane?

The fundamental difference between an airplane and a rocket is the engine. The jet engine (air-jet engine of an airplane), in airless space (or in very rarefied layers) will suffocate, because it needs to consume oxygen, for the fuel combustion process.

In a rocket engine, there are fueled chemical mixtures that cause the fuel to burn, so it does not need to draw oxygen from the atmosphere.

Otherwise, it's not about first space speed, it's about the fact that in order for an airplane to fly into space, it must become a rocket, or its engines will stop working.

How are interstellar distances measured?

To measure enormous distances, astronomers are aided by the method of triangulation, widely used in ordinary Earth geodesy. We choose a segment of known length, measure from its ends the angles under which the inaccessible point is seen, and then simple trigonometric formulas give the desired distance.

This was the easiest and most accessible way to calculate the cosmic distance 🌠

Why does the Moon "follow" us when we drive?

As we rush down the road, we notice how everything flies past us in the opposite direction: trees, houses, fences, the road. And from the Moon, too, we expect it to fly past us, or at least go backwards the farther forward we go. When it doesn't, we feel as if it is "following" us.

The Moon may not seem to be very far away from us, but the average distance from it to Earth is 384,400 km. This enormous distance explains why, when we drive a car and look at the Moon, it seems as if it is following us.

Compared to the distance our car travels in a few minutes, this distance is enormous. So as we drive, the angle at which we see the moon remains virtually unchanged. And while everything flies past us, there is a sense that the Moon is "following" us.

All Formulas of Maths, Physics and Chemistry for Schools

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India's Thar Desert Rajasthan 🐪 may become green in future 👌

One of the most interesting and well-known variable stars in the constellation of Aquarius is R Aquarii.

Its variability was discovered by Karl Ludwig Harding in 1765-1834.

Harding originally searched for the "missing" planet between Mars and Jupiter as part of the Celestial Police Project.

How to distinguish a meteorite from terrestrial geological objects?

In fact, only an expert in the field can reliably distinguish a meteorite fragment. However, there are general recommendations that will help you get if there is a chance that you hold a meteorite in your hands:

- the edges of the meteorite are melted (due to heating after passing through the Earth's atmosphere);
- the meteorite has magnetic properties (if you put a strong magnet to it, it will be magnetized);
- the meteorite is heavy (a similar-sized stone will weigh much less);
- it shows peculiar "fingerprints", as if left by hands on plasticine;

The list of these signs will allow you to make at least a preliminary assessment.

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Biodiversity heritage sites in India

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A clear example of how planets move

The time it takes the planets to make a complete revolution around the Sun is naturally different.

Mercury, the closest to the star, has 88 Earth days. Our Earth completes the cycle in 365 days and 6 hours.

And the largest planet in the solar system, Jupiter completes its rotation in 11.9 Earth years. And Pluto, the most distant planet from the Sun, has a revolution of 247.7 years.

NDTV: Earth Receives Laser Message From 140 Million Miles Away In Deep Space
https://www.ndtv.com/science/earth-receives-laser-message-from-140-million-miles-away-in-deep-space-nasa-5570727

Photos of Pluto 24 years apart

The photo on the left was taken in 2018 by the New Horizons spacecraft less than 1 million km from the planet's surface.

The photo on the right was taken in 1994 by the Hubble telescope, from a distance of 5.7 billion km.

और चलाओ फोन😂😂

Focus on the Job in Hand

How might extraterrestrial civilizations see Earth?

To find out exactly what an outsider might see, scientists used about 10,000 images of our planet taken by NASA's DSCOVR satellite.

Then they scaled down several times to simulate the distance of several light years. On the resulting image, they highlighted the parameters that most characterize the most prominent parts of the Earth.

As a result, the image produced a two-dimensional map of the Earth's surface, reconstructed from light curve readings without any assumptions about its spectral properties.

Quasars emit 100 times more energy than the sum of all the luminaries in our galaxy

Initially, it was assumed that all pseudostars are powerful sources of radio emission.

But by 2004 it became known that there are very few of them, about 10%, while the rest are considered to be radio-quiet.