Week 2
Research the question - what is dark energy and dark matter?
Write a post summarising your answer.
Research the question - what is dark energy and dark matter?
Write a post summarising your answer.
Introduction - week 1
Dark Energy and Dark Matter. What is Dark Energy? What is Dark Matter? Why does it matter? I'd like you to explore the current state of knowledge about dark energy and matter. You should find out about the experimental observations that have led scientists to conclude that it exists. You are also going to investigate the theories that try to explain dark energy and matter. I have proposed this topic, precisely because scientists do not yet have the answers, so I want you to experience what science is like when it is new and there are different ideas and theories that compete with each other. I hope you enjoy your learning! https://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy Task for this week: Read this article and write a post, with the questions that you want to answer over the next 10 weeks.
scientists can not yet fully explain what dark matter is due to it being possible to detect. however, we do understand that it has a gravitational pull. meanwhile, dark energy is said to be the cosmological constant generated by quantum fluctuations which has a repulsive force which accelerates the expansion of the universe. it also seems to grow stronger as the universe expands.
ReplyDeleteDark energy is so complex to understand, that to this day, scientist themselves cannot fully explain what it is, as it is hard to detect. We have been able to understand it makes up 68% of the universe. Also, one theory is that its a property of space. Another explanation for dark energy is that it is a new kind of dynamical energy fluid or field. It could even be a new theory of gravity, we need more data and better data to understand this
ReplyDeleteOn the other hand, dark matter is said to make up 27% of our universe.
Dark matter is dark, telling us its not in the form of stars or planets. Also it isn't in the form of dark clouds of normal matter, made of baryon particles. We know this because we are able to detect baryonic clouds as they absorb radiation which passes through them.
Dark energy is roughly 68% of the universe and could be considered to be a property of space, this links in to Einsteins gravity theory however it is not correct and we may need to create a new theory on the idea of gravity as its properties in dark energy and dark matter may be different to our "normal" matter.
ReplyDeletedark matter i s about 27% of the universe, dark matter is dark and doesn't take the form of planets and stars as the matter that we know does. Second, it is not in the form of dark clouds of normal matter, matter made up of particles called baryons and so the most common view is that dark matter is not baryonic at all, but that it is made up of other, more exotic particles like axions or WIMPS (Weakly Interacting Massive Particles).
Dark matter is responsible for around 25% of the universe, but is impossible to detect with our current technology, as it does not interect with baryonic matter. One leading hypothesis is that dark matter is made of exotic particles that don't Interact with light nor matter, but exert gravitational pull.
ReplyDeleteDark energy is responsible for around 70% of the universe. One theory says that dark energy is a fifth fundamental force that fills the universe like a fluid. Modifying our current theories of gravity could explain dark energy. Even though scientists think that dark energy might be responsible for the acceleration on the expansion of the universe, there isn't a plausible explanation for it yet.
Apart from the 5% of the universe comprised of normal matter the rest of the universe has been said to be made of a substance called dark matter and a force referred to as dark energy.
ReplyDeleteNot much is known about the two at the moment but so far we know that dark energy is a mysterious substance which so far has not been observed directly and is thought to take up roughly 25% of the universe. Dark energy on the other hand is a force that repels gravity and takes up about 70% of the universe.
Dark energy makes up around 68% of the universe and it acts in opposition to gravity and so causes the universe to expand. An explanation of dark energy is that it is a property of space and so as the space expands the dark energy is diluted and more space and dark energy should come into existence. Another explanation is that it may be a new type of dynamical energy fluid that only interacts with gravity.
ReplyDeleteDark matter makes up around 27% of the universe was theorised by physicists as there didn't appear to be enough normal matter in the universe to explain gravitational effects observed by physicists and there must be some undetectable (by current astronomical equipment) matter that exists to explain what physicists had been observing. We don't have any idea what dark matter is made of though, some theories include exotic particles like WIMPs or axions or that it is baryonic matter but it is all tied up in brown dwarfs.