SARA UAE - Space & Rocketry Academy

The true shape of Earth is not a perfect sphere—and it isn’t a smooth oval either.

Scientists call Earth’s gravitational shape the geoid.

The geoid represents the shape the global ocean would take if it covered the entire planet and were influenced only by Earth’s gravity and rotation. Because Earth’s mass is not distributed perfectly evenly, gravity is slightly stronger in some regions and weaker in others.

That creates subtle rises and dips across the planet’s gravitational surface.

The colorful, exaggerated images often used to show the geoid are not Earth’s actual physical shape. The mountains and valleys are scaled up dramatically so the tiny differences in gravity can be seen.

In reality, Earth is still incredibly close to a sphere. The geoid is a model of how gravity varies around the planet—not a picture of a lumpy Earth.

SpinLaunch is trying to launch objects into space without using a traditional rocket for the first part of the journey.

Instead of relying entirely on rocket engines, SpinLaunch uses a massive rotating vacuum chamber to accelerate a payload at extreme speeds before releasing it toward the upper atmosphere.

The idea is similar to swinging a ball on a string and letting go at exactly the right moment—except the payload could experience forces thousands of times stronger than Earth’s gravity.

Once released, the vehicle would continue upward before using a smaller rocket engine to complete the journey into orbit.

The concept could potentially reduce the amount of fuel needed, lower launch costs, and make launches more frequent. But there is a major engineering challenge: the payload has to survive the extreme acceleration, heat, and forces created during launch.

It sounds like science fiction, but SpinLaunch has already tested its technology with suborbital launches.

Would you trust being launched into space by a giant centrifuge?

A rocket engine can burn at temperatures approaching 3,000°C….so why would engineers build parts of it using copper?

Because copper is incredibly good at moving heat.

The inside of a rocket engine is not simply exposed to extreme temperatures and left to survive. Many engines use **regenerative cooling**, where extremely cold rocket fuel flows through hundreds of tiny channels built into the copper combustion chamber and nozzle walls before entering the engine.

As the fuel travels through those channels, it absorbs heat from the metal and keeps the chamber from melting. The heated fuel is then fed into the combustion process.

Copper’s high thermal conductivity allows heat to spread quickly into the cooling channels instead of creating dangerously hot spots in one area.

The metal is not surviving because it can withstand 3,000°C on its own.

It survives because the engine is constantly cooling it from the inside while firing.

On July 2, 2013, a Proton-M rocket lifted off from Kazakhstan… and failed just seconds later.

The rocket began pitching and rolling almost immediately after leaving the launch pad. It lost control, flipped over, and crashed back to Earth in a massive explosion.

The cause was traced to three small angular-rate sensors that had been installed incorrectly during assembly. These sensors help the rocket determine how it is rotating. Because they were mounted the wrong way, the guidance system received incorrect motion data and commanded the rocket to make corrections in the wrong direction.

Three small components were enough to bring down a rocket carrying three navigation satellites.

The failure became one of the clearest examples in aerospace history of how precision matters at every level. A vehicle weighing hundreds of tons can depend on the correct installation of parts small enough to hold in your hand.

A black hole isn’t just a giant hole in space. It has a surprisingly complex structure.

At the center lies the singularity, a point where our current understanding of physics breaks down and matter is thought to be compressed to an extraordinary density.

Surrounding it is the event horizon, often called the point of no return. Once anything crosses this boundary, not even light can escape the black hole’s gravity.

Outside the event horizon, many black holes are surrounded by an accretion disk—a swirling ring of gas and dust heated to millions of degrees as it spirals inward. This material can outshine entire galaxies before disappearing beyond the horizon.

Some supermassive black holes also produce relativistic jets, enormous beams of particles that shoot into space at nearly the speed of light, stretching for thousands or even millions of light years.

The black hole itself is invisible.

Everything we see comes from the extraordinary effects it has on the matter, light, and spacetime around it.

Starship V3 made its debut on May 22, 2026, marking the beginning of SpaceX’s next generation launch system.

This wasn’t just another Starship test. It was the first flight of the upgraded V3 vehicle, powered by new Raptor 3 engines, launching from the newly built Pad 2 at Starbase, and the first mission to deploy modified Starlink satellites designed to image Starship during flight.

Although the Super Heavy booster was unable to complete its planned boostback burn and ended in a hard splashdown, the upper stage reached its intended trajectory despite losing one engine during ascent. It successfully deployed its payload, gathered valuable heat shield data during reentry, and completed a controlled splashdown in the Indian Ocean.

For a rocket that stands nearly 400 feet (120 meters) tall, every test is about collecting data, pushing limits, and improving the design for the next flight.

Every launch brings Starship one step closer to becoming a fully reusable spacecraft capable of carrying satellites, supporting NASA’s Artemis missions, and eventually transporting humans to Mars.

The International Space Station is one of the quietest-looking places ever built, but inside, it is anything but silent.

There is no sound in the vacuum of space, so the Station itself cannot be heard from the outside. Inside, however, astronauts live in a constant background of mechanical noise.

Air has to be continuously circulated because, in microgravity, warm and cool air do not naturally circulate the way they do on Earth. Fans, pumps, life support systems, computers, and scientific equipment all run around the clock, creating a steady hum throughout the Station.

Astronauts often describe the ISS as sounding more like a busy machine room than a peaceful spacecraft. Every module has its own unique sound, and experienced crew members can even recognize when something is different simply by listening.

Silence in space might sound relaxing, but aboard the ISS, that constant hum is actually the sound of the systems keeping everyone alive.

Water is one of the most extraordinary examples of how completely new properties can emerge from simple ingredients.

Hydrogen is an extremely flammable gas. Oxygen is the gas that helps things burn.

Yet when two hydrogen atoms chemically bond with one oxygen atom, they form H₂O, a substance that extinguishes fire instead of fueling it.

The transformation goes even deeper.

Water is colorless, odorless, and liquid across a temperature range that makes life on Earth possible. It expands when it freezes, allowing ice to float and insulate lakes instead of sinking. It dissolves more substances than almost any other liquid, making it essential for biology, weather, and the transport of nutrients throughout living organisms.

None of those properties can be predicted by simply looking at hydrogen or oxygen on their own.

Sometimes the most remarkable things in the universe are not the largest galaxies or the brightest stars, but the unexpected ways the fundamental building blocks of nature come together.