| Homeschool science provides you with the | | | | matter that we cannot see. |
| opportunities to learn about the skies and the stars at | | | | Evidence of the existence of dark matter was found |
| your own pace. We know that a telescope helps us | | | | when rotation of galaxies was observed. According to |
| to see the stars. This is because stars emit light. A | | | | the laws of science, stars that were farther away |
| telescope can only see matter that emits some type | | | | from the center of a galaxy should decrease in speed. |
| of electromagnetic radiation (luminous matter). A | | | | But it was found that this was not the case. This |
| particle can be seen when it either emits light or | | | | proves that they were influenced by the gravitational |
| radiates photons as it cools down. This can be done | | | | force of some invisible matter: dark matter. |
| only by particles which are either positive or negative in | | | | Dark matter which is as big as an asteroid is said to |
| charge, and we can see such particles. | | | | shift star brightness by up to 3 minutes. It the dark |
| What about particles that are electrically neutral? The | | | | matter is as big as the earth, the time would be 3 |
| human eye cannot see them. | | | | hours. A shifted brightness of two weeks could be |
| There are tons of homeschool science experiments | | | | calculated for dark matter as big as the sun, and eight |
| that can demonstrate how charged particles and | | | | months if it was ten times bigger than the sun. |
| electrically neutral particles behave. Scientific evidence | | | | Theories on dark matter say that dark matter consists |
| shows that there are such neutral particles called "dark | | | | of 90 percent of the matter in the universe and are |
| matter" in the universe that cannot be seen, as they | | | | spread in a spherical way. Extensive research is |
| do not emit any radiation. How then do we know that | | | | underway on this topic and more and more information |
| they exist? | | | | is being revealed. |
| It was noticed that when stars were photographed at | | | | You must understand that the universe is filled with |
| a particular night, and then when they were | | | | magic and with mystery. Most scientists were self |
| photographed again after a few months during a solar | | | | motivated and self learners, and that is why we know |
| eclipse in the day, their positions were found to have | | | | so much about our universe. A good homeschool |
| shifted. What caused this shift? The obvious answer is: | | | | science program can help you develop self motivation |
| the gravitational force of the sun had deviated the | | | | and be a self learner. |
| starlight, making the stars appear to have shifted. | | | | If you are fascinated by the universe, there are |
| However, when observing starlight from different stars | | | | innumerable astronomy projects that you could learn |
| at night (when there is no sun) it was still found that the | | | | about and perform. For your free "Homeschool |
| starlight had been still deviating or bending. This was | | | | Parent's Guide to Teaching Science", filled with great |
| found to be due to the gravitational force of dark | | | | science experiments and activities, visit the link below. |