Robert Jack
Bio
One of the secrets of emotional stability for adults is to keep the expectations of others to a minimum.
Stories (70)
Filter by community
Our solar system has been invaded by another star
The Milky Way is a huge galaxy with hundreds of billions of stars, and the Sun is only one of them, not a particularly impressive star, which, together with many other stars in the galaxy, is orbiting around the center of the galaxy.
By Robert Jack3 years ago in Earth
Coincidence or another hidden agenda?
The Moon is the closest planet to Earth and the brightest and most easily observable object in the Earth's night sky. Interestingly, because the Moon always faces the same way toward the Earth, for us humans living on Earth, we can always observe only one fixed side of the Moon.
By Robert Jack3 years ago in Earth
Looking back at the history of mankind
Looking back at the history of mankind, we can see that if there is a breakthrough in a particularly useful science and technology, human civilization will develop by leaps and bounds as a result. This was the case in the past, and the future should be the same, so the question arises, for modern mankind, which science and technology once a breakthrough, human civilization will be a quantum leap forward?
By Robert Jack3 years ago in Earth
Why are we having summer when the earth is far from the sun?
Every moment, the Earth is revolving around the Sun. Since the Earth has an elliptical orbit, the distance between the Earth and the Sun is not constant in the process of revolving around the Sun, sometimes the Earth is far away from the Sun, and sometimes it is closer to the Sun.
By Robert Jack3 years ago in Earth
How much gold is there on the planet?
Among all the metals on earth, the most loved by human beings is undoubtedly gold human beings have loved gold for a long time, and from the current archaeological data, all the known ancient civilizations on earth regarded gold as a precious thing.
By Robert Jack3 years ago in Earth
What is the special significance of -273.15°C?
toThereisIf someone asks, what is the lowest temperature in the universe? I believe we can all answer: -273.15℃, but if pressed, what is the special meaning of this -273.15℃ with zero and whole? Why is the minimum temperature of the universe limited to -273.15℃? Some people may not be able to answer, but it's okay to answer, let's talk about this knowledge below.
By Robert Jack3 years ago in Earth
Why is Jupiter so big?
Jupiter and Saturn are the first and second largest planets in the solar system respectively, with Jupiter's average diameter being about 139,822 km and Saturn's average diameter being about 116,464 km. In terms of volume, Jupiter is not much bigger than Saturn, but in terms of mass, Saturn is far less than Jupiter, as Saturn's mass is about 5.6834 x 10^26 kg, while Jupiter's mass is about 1.8982 x 10^27 kg.
By Robert Jack3 years ago in Earth
are lucky to have escaped
The universe is full of all kinds of dangers, even on Earth, which is known as the "paradise of life", we still face threats from outer space, such as those asteroids "wandering around" in the solar system, that will come close to Earth from time to time, and If they hit the Earth, it may bring a disaster to mankind.
By Robert Jack3 years ago in Earth
Since the universe was born at a singularity
I believe we are all familiar with the "big bang theory of the universe", after all, this is the mainstream theory to explain the origin of the universe, we usually understand the theory that the universe was born in a very small, very dense, extremely high-temperature singularity, about 13.8 billion years ago, this singularity exploded, and then gradually evolved into what we now The universe as we see it now. But the question is, since the universe was born in a singularity, what is outside the singularity?
By Robert Jack3 years ago in Earth
The sun is quietly changing
The sun is the source of everything on earth, it is because of the sun's light and heat, the earth can become a vibrant planet, however, the sun is not an eternal existence, with the evolution of the sun, one day, the earth will become no longer suitable for human survival, then the sun left human time how long it?
By Robert Jack3 years ago in Earth
