September 19, 2022
The James Webb Space Telescope was named after a former administrator who worked for NASA in the 1950s and 60s and oversaw the Apollo program. It is the world’s largest and latest orbiter telescope with a mission length of 5 to 10 years. It cost a whopping 10 billion USD and took about 25 years …
October 20, 2020
In order to answer this question, we first need to define what we mean by up and down in space. And also acknowledge that the only reason ‘up and down’ exists as a binary is because we created them as humans.What is up and what is down?Since we are held to the surface of the …
October 20, 2020
The earth’s ocean tides are not just caused by the moon’s gravitational pull, they are actually also caused by the sun’s gravity too. We are led to believe that it is just the moon, but this is not the case.How strong does gravity have to be to affect the tides?The tides on earth are not …
October 20, 2020
How to define a space movieWhen we talk about space movies, we can mean one of two things: movies that are simply set in space and science fiction movies. These are so different in that movies set in space can have the capacity to be incredibly accurate, but science fiction movies are designed to be …
October 20, 2020
What is the speed of light?The speed of light in a vacuum always travels at exactly 299, 792, 458 meters per second. This is the unit c in equations. This is the case from the moment of its creation, light does not need to accelerate to this speed, it is already going this speed from …
October 20, 2020
Although the question suggests that it is a fact that the Great Wall of China is visible from space, it actually is not visible to the naked eye from space. According to NASA themselves, the Great Wall of China is not even visible to the naked eye when in low-earth orbit. Yes, the Great Wall …
October 20, 2020
The real question should be: what is the speed of gravitational change propagation? This might be a little confusing at first, but this answer will help to make sense of the topic.Other questions that ariseSince this question is quite a big one to ask, there are also some other questions that it uncovers alongside it. …
October 20, 2020
The short answer is that there is no set limit that is rigid for a magnetic field strength. But some interesting things will start to happen when magnetic fields reach a high strength.How does a magnetic field work?A magnetic field will act in a way that exerts its force sideways onto a moving electric charge. …
October 20, 2020
Contrary to the suggestion of the question, a space ship would not stop when it runs out of fuel. Even though there are objects in space like gas, dust and particles, they are in such low concentrations and so spread out that it is highly unlikely that a space ship would come into contact with …
October 20, 2020
Actually, the wind is not the only factor that causes ocean currents. It is true that the wind plays a role, but it is only a small one compared to some of the other variables involved. On top of this, the factors that we are about to explain, including wind, act in different ways on …
October 20, 2020
What is a photon?A photon is a particle of light. Or, more specifically, it is a particle that represents light. A photon will carry energy.Can a photon travel at the speed of light?Since a photon is a particle of light, this means that it does not need to accelerate to light speed, as it is …
October 18, 2020
The basicsThe heart does not actually work on its own to pump blood all the way around the body, this is because there would be a high amount of pressure at the area of the heart and a significantly lower pressure at the extremities. So, imagine blood being pumped away from your heart to the …
October 18, 2020
The simple answer is no, gravity does not extend out forever. Although there is a theory that states that it does.Newton’s Law of Universal GravitationNewton’s law states that the force of gravity on one mass due to another mass will depend mainly on their separation. This separation is represented as r where the dependence is …
October 18, 2020
The short answer is that you do actually weigh less at the equator than you do stood at the North Pole. This is the same for the South Pole too. But this answer will debunk some of the mystery surrounding the answer and delve deeper into why this is the case.Does your body change when …
October 18, 2020
Can you make a shock wave of light by breaking the light barrier just like supersonic airplanes break the sound barrier?The answer to this is twofold, because it can be answered both yes and no. It depends on the material that you are in.Can anything travel the speed of light?Yes, particles that are considered quantum …
October 11, 2020
Conversely to the question, the moon is actually not that bright, especially when we compare it to other astronomical objects in space. The reason that the moon appears so bright in our night sky on earth, is because we are comparing the brightness of it to the object around us that are receiving absolutely no …
October 11, 2020
In a short answer: light is not in fact pure energy. It is, however, true that light has no mass. But the fact that light has no mass does not mean that light is pure energy. Light is actually made up of objects called photons. This can be compared to other fundamental quantum objects since …
October 11, 2020
On the contrary, gravity is actually the weakest force. This is true when it comes to the fundamental forces anyway. If you order the four fundamental forces from weakest to strongest, it would look like this: gravity, weak nuclear force, electromagnetic force, and the strong nuclear force. If we are to zoom in on two …
October 11, 2020
Logically, there can be no darkness without the existence of light. Think of a bright day accompanied by the shadows that the sun casts when blocked by something like a streetlamp. Darkness is simply the absence of light, so it follows that it travels at the speed of light. The absence of light, or darkness, is …
October 5, 2020
There are not really any solidly compelling pieces of proof that show that a full moon can make people crazy and commit crimes. But the myth surrounding this claim is greatly interesting. Since the term ‘lunacy’, a word we use to mean ‘mad’ or ‘crazy’, is derived from ‘Luna’ meaning ‘moon’, the origins of this idea …
October 5, 2020
We cannot use gravity as an infinite energy source. This is because gravity cannot actually be used as an energy source at all. Since gravity is a force, it is not an energy source. Energy and force are two different things and should not be confused. Where energy can be described as being a property in …
October 5, 2020
A lot of scientist will say that astrology does not ‘work’. But believers in astrology will tell you that it is real and that it does work. The real answer is that it depends what you mean by the word ‘work’. Both answers and groups of people are technically right, depending on their definition of ‘work’. …
October 5, 2020
The short answer is that astronomers have been seeing violets shifts occur a lot, because they actually happen all the time. But we call them blue shifts. The way we can tell the type of shift is by looking at the light that a star emits. Obviously this color is relative to the colors that we …
October 3, 2020
When I took physics in college, I seem to remember a formula that related the wavelength of light to its energy. Could the wavelength of a photon of light be altered by a loss of energy, however small, over its path through intergalactic space? If that were true, looking at a trip of millions / …
October 2, 2020
Planet X (Nibiru) is supposed to whip around from behind the sun and near-smack us every 3600 years. Almost all of the scenarios I’ve seen on YouTube require a complete suspension of orbital mechanics as currently understood. What sort of bizarre cometary orbit would be required to keep a planetary body close enough to the …
