How do we know what time it is?

The positioning of the moons around Jupiter have even been used to keep track of time. Now days our most precise time measuring devices are atomic clocks. By measuring the vibrations of the crystals contained in them, we can measure the passage of time in a very accurate manner.

Is time really relative?

Time seems to follow a universal, ticktock rhythm. But it doesn’t. In the Special Theory of Relativity, Einstein determined that time is relative—in other words, the rate at which time passes depends on your frame of reference. Time is relative even for the human body, which is in essence a biological clock.

Who keeps official time?

While many nations operate an official time service, NIST has the highest-capacity timekeeping network. It’s also the most popular. Jeff Sherman, a NIST physicist, recently tracked requests to two NIST timeservers for one month.

What do you mean by scientific knowledge?

Scientific knowledge is the set of verifiable knowledge given by certain thanks to the steps contemplated in the scientific method. That is, those knowledge obtained through the rigorous, methodical and verifiable study of the phenomena of nature.

Does the body of scientific knowledge build on previous ideas?

Thus, the body of scientific knowledge builds on previous ideas and is constantly growing.

Does time really exist?

Time is certainly a very complex topic in physics, and there are people who believe that time does not actually exist. One common argument they use is that Einstein proved that everything is relative, so time is irrelevant. In the bestselling book The Secret, the authors say Time is just an illusion..

How can I be confident in the scientific process and knowledge?

It’s easy to be confident in the scientific process and our knowledge when we can provide irrefutable evidence, as we were able to do by orbiting around the Earth in a spaceship and taking pictures of an obviously round planet.