Rockets: Escape Velocity - Deepstash





What is rocket science?

Rockets: Escape Velocity

The thrust required for an object to overcome Earth’s gravity and atmospheric resistance and move towards space is called escape velocity. Besides Earth, the gravitational forces that can affect the object are those coming from the sun, moon and even other planets.

Apart from space vehicles and the military, rockets are used in life-saving rescue flares and fireworks, and even the ejector seats in military planes.




NASA - planetary science
NASA - planetary science

At the beginning of this year, NASA scientists had to decide which missions should explore our Solar System. They chose four missions for further study from the 20 intriguing ideas submitted. From ...

Emerging technologies for space exploration

Two emerging technologies may propel NASA and the rest of the world into an era of faster, low-cost exploration that would lead to more exploration and democratise access to the Solar System.

  • A new generation of companies is developing new rockets for small satellites. Rocket Lab has a lunar program for its small Electron rocket, and Virgin Orbit with a group of Polish universities is to launch up to three missions to Mars with its LauncherOne vehicle.
  • At the same time, various components of satellites are being miniaturised.
  • Tiny satellites are no longer theoretical. Two years ago, a pair of CubeSats, called MarCO-A and MarCO-B, launched with the InSight mission. The briefcase-sized satellites deployed their own solar arrays and journeyed to Mars.
Small sats in deep space

NASA had several goals with MarCO. The MarCOs proved that small satellites could thrive in deep space and stream data back home.

A few months after their mission ended, the European Space Agency announced that it would send two CubeSats on its "Hera" mission to a binary system.

  • Asteroids are rocks which revolve around the sun. They are usually too small to be considered as a planet since they can be as small as 2 meters but they can be as big as 94...
The formation of asteroids

Asteroids are what's left after the formation of our solar system from billions of years ago.

It is believed that the reason why they were formed were because of the birth of Jupiter. Its birth hindered any planetary bodies to form in the space between Mars and Jupiter, which resulted to the small objects that were present to crash onto each other and fragment themselves.

The two theories that back this up are the Nice model and the Grand Tack.

Categorizing asteroids

The different types of asteroids are:

  • Main belt asteroids - Lies in between Mars and Jupiter; holds more than 200 asteroids
  • Trojan asteroids - found outside the main belt; usually orbits larger planets
  • Near-Earth asteroids (NEAs) - circles close to earth; there are three types of NEAs, Apollo, Aten, and Atira
  • The C-type - carbonaceous asteroids
  • The S-type - silicaceous asteroids
  • The M-type - metallic asteroids
  • The V-type - has a basaltic and volcanic crust