How does centrifugal force cause the far-side bulge? vIII = 16,7 km/s. The truth is, the universe is slowly dying as it expands and grows and gradually cools. The shortest-lived ones can shine for tens of millions of years while the old-timers can last for many billions of years. 8/28/2014 12:03:18 am. The position of a star in the diagram provides information about what stage it is in, as well as its mass and brightness. That depends on many factors, including how dark the skies are where. What is the range of weapons if used in space? In light-polluted areas, people see only the brightest stars and not the dimmer ones. You should only ask practical, answerable questions based on actual problems that you face. What would space ships actually look like in space? Edited and updated by Carolyn Collins Petersen. Our universe is now 13.8 billion years old and measures 92 billion light-years across. Direct observation (by sampling or remotely) is mostly limited to a thin layer around the solid surface of the Earth, and physical experimentation is limited to the pressures of the uppermost layers of the planet. It was really the beginning of the expansion of space and time, from a small point that contained the entire universe. Why are stars not blurred even though the earth is moving? How would you explain the idea of ju… What interests you the most about this subject? being in space without a spacesuit WILL kill whoever is unlucky enough to be in that situation. Depends on the weight of the rocket. They are a result of our orbit around the Sun combined with the Moon's orbit around Earth. However, another cool thing happens: the collision creates gravitational waves and those can be measured! Don't black holes suck everything in? 5 Questions Astronomy Still Can't Answer. Certainly, it's a very energetic event and would give off a lot of radiation. How often does the sun's magnetic field flip? its shapes are called the phases of the Moon. First, have a look at some of the other questions about this and related topics in this relativity questions archive. The short answer is: the stars themselves don't twinkle. Astronomy and space exploration are topics that really get people thinking about far away worlds and distant galaxies. I need an open-ended question for astronomy that has many different answers!? People are fascinated by black holes and their actions in the universe. 20 Comments beckett jett link. The legal definition of space is that it begins at the top of the atmosphere. How important do you think self-improvement is? The standard space-travel answer to that question puts the "edge of space" at 100 kilometers above Earth's surface. Opinions expressed by Forbes Contributors are their own. Science. Our Sun is properly classified as a yellow dwarf. How do space probes make it past the asteroid belt without crashing into asteroids? Frequently Asked Questions About General Astronomy Compiled by Dr. John Simonetti of the Department of Physics at Virginia Tech. Test 1 (PDF) Test 2 (PDF) Test 3 LG list (PDF) (for grand tour section only - recall that tests are cumulative.) Your questions should be reasonably scoped. Chatty, open-ended questions diminish the usefulness of our site and push other questions off the front page. How does looking at distant galaxies allow us to look back in time? The first stars formed a few hundred million years after the expansion began. It's called a planetary nebula. The outer ring shows what we see on the Earth during each corresponding part of the moon's orbit. The universe began some 13.7 billion years ago in an event called the Big Bang. The children's nursery rhyme about "Twinkle, twinkle little star" actually poses a very sophisticated science question about what stars are. Relevance. Or does it belong to space? Dozens and dozens of people have done it, and more will in the future! Astronomers classify stars and assign "types" to them. What are some of your plans for the future? Do all objects in the universe exert force on all other objects? Space Questions. Why did people believe the earth is the center of the solar system when it's obvious the sun is? Many of the questions above are related to the extreme diversity of spatial scales of Earth processes. The universe is a big place to explore, and as we learn more about it, the questions will continue to flow! Astronomy is the study of celestial objects outside of our planet's atmosphere. 1. First, make sure that your question is on-topic for this site. 4. Those waves are also created when neutron stars collide! Would a guitar sound the same on a space station. Question Title * 31. Over the last few weeks people have been sending their questions in to the Cosmic Comics astronomy expert. Our planet's atmosphere causes starlight to waver as it passes through and that appears to us as twinkling. The green line is airglow high in the atmosphere, caused by cosmic rays striking the gases up there. This is one of those questions that has an answer that is quite mind-expanding. When two supermassive black holes collide and merge, some of the excess energy from the event is broadcast as gravitational waves. Why does the moon's gravity cause tides on earth but the sun's gravity doesn't? Please take the time to browse our site and first try to use the resources online to find an answer to your question. Basically, the universe consists of galaxies and the objects they contain: stars, planets, nebulae, black holes and other dense objects. Object visible from space obvious the sun in ninth grade and have just read astronomy and want to about! Are scattered throughout the month, and other characteristics, caused by Cosmic rays the! 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