Here’s what ‘Gravity’ gets right and wrong about space

Kevin Grazier, a scientific advisor to Alfonso Cuaron's new movie "Gravity", chosen by Twitter's famous astrophysicist Neil DeGrasse Tyson

Former NASA engineers and UCLA professors insisted, "I've never seen such a good movie picked up," and looked at a series of "Star Fortress" programs.

In his new book "Gravity Wells" Sandford is at the forefront of the aerospace industry, taking advantage of his 28 years of space flight expertise. One impressive obstacle prevented people from traveling in the deep space. The exact physical definition is not as important as the black area of ​​the space - it has terrain. It has mountains, flat places and valleys we have to negotiate. If you play the card correctly, you can go a long way with less energy. If you accidentally played cards, you can spend a lot of energy so far.

Gravity of space - There are many. Gravity is everywhere. Certainly, as you move further away from the earth, its gravity decreases. However, it died very slowly (compared to nuclear power). Gravity never completely disappears. When you are very close to another big body, moon, Mars or the sun, its gravity exceeds the gravity of the earth. Only then can you ignore the gravity of the earth. Because gravity is everywhere in the universe, the objects of the universe always fall towards the earth, towards the sun, and towards the center of the Milky Way. When an object actually falls, the object appears to float in space without gravity for two reasons.

Gravity wells are the result of gravity caused by objects in space like planets. For many years, myths have begun to consider large holes as "gravity wells". However, the technical definition and power are more complicated than this, forming a beautiful natural funnel shape. Some people compare the space with the mesh fabric, and the planet is placed on a fabric like a heavy ball. As shown above, the weight of the planet stretches the cloth to form a funnel and approaches the planet as it steepens. The larger the gradient, the greater the gravity