Exploring Interesting Facts About Space, Science, and the Universe

Priyanshu September 02, 2024

Did You Know ?

1. The Speed of the International Space Station

There are over 7,500 man-made satellites around Earth.

The International Space Station (ISS) is the most important satellite.

The ISS moves incredibly fast:

Speed: 28,500 kilometers per hour

Or 7.8 kilometers per second

To understand this speed:

If ISS was on the ground, then it could go from Delhi to Mumbai in just 3 minutes

It's about 47.8 times faster than a bullet train

The ISS is an example of advanced space technology.

Building the ISS was a huge project:

It cost around 200,000 crores

This shows how complex and expensive space exploration is.

The ISS is much faster than other human-made things.

It's an example of how fast objects can move in space.

Its speed helps it stay in orbit around Earth.

This fact highlights the incredible capabilities of modern space stations.

2. How Fish See the World

Everyone knows humans live on land, while fish live in water.

Fish see their world very differently from how we see ours.

Just as we can't see air, fish can't see water as a separate thing.

For fish, water is like our atmosphere.

Fish only notice water when something changes:

Like waves

Or objects sinking

This is part of how fish understand their environment.

If fish made a world map, it would look different as shown in above picture.

A fish's map would be based on their underwater world.

It's an interesting way to think about fish perspective.

This fact helps us understand how fish experience their world.

3. Theories on How the Universe Might End?

There are many ideas about how the universe might end.

One theory is called Vacuum Decay Theory:

According to Vacuum Decay Theory "suddenly the universe will cease to exist within a second".

We wouldn't know that we ever existed.

Everything would become empty in a second just like blank/empty/nothingness/emptiness/void.

The official definition of Vacuum Decay Theory is:

A catastrophic event where the universe as we know it could suddenly disappear or be destroyed in an instant as a bubble of true vacuum expands at the speed of light, erasing everything in its path.

Another theory is the Big Crunch:

The official meaning of Big Crunch theory is: "a hypothetical scenario for how the universe might end, with the universe contracting and collapsing back into a singularity".

Here is the explanation of this theory:

The universe started from a single point after the Big Bang.

From this point, the universe began to come into existence.

After the Big Bang, the universe started expanding and is still expanding in real-time.

According to the Big Crunch theory, the universe will continue to expand until its expansion decelerates.

This means that the expansion will slow down, eventually stop, and then begin to reverse (a reduction in size).

As a result, everything in the sky will start getting closer; all matter, stars, etc., will begin to compress, and in the end, the entire universe will be completely destroyed and a new universe will be formed.

Our universe also have started this way.

They show different ways the universe end.

Both theories involve a kind of cosmic collapse.

4. Student Breaks Record by Building a Nuclear Device

Many things seem impossible to make at home.

A nuclear device is usually thought to be one of these things.

Cesare Mencarini, a student in the UK, changed this idea.

Mencarini built a nuclear machine for his college project.

This was something no other student had done before.

This achievement shows:

How clever young students can be

How determined some students are

This is an example of surprising student innovation.

It's a remarkable science achievement.

5. Cold Welding in Space

On Earth, putting two pieces of iron together is not special.

In space, something very different happens with iron.

In space, two pieces of iron will stick together forever and form a single piece of iron within minutes.

This process is called cold welding.

Why cold welding happens in space:

There's no air in space

There's no water in space

So no oxide layer forms on the iron

Without this oxide layer, the iron pieces can bond directly.

This only happens with metals in space.

It shows how materials act differently outside Earth's atmosphere.

Cold welding is a unique space phenomenon.

It's an example of space physics.

This fact highlights differences between Earth and space environments.

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