We often hear from astronomers and other scientists about 'near-earth asteroids' - lumps of rock and metal that orbit through our Solar System, and pass close enough to our planet to pose an impact risk. But many people wonder what this means, and ask additional questions. How many are ...
Panspermia and 'Oumuamua: Here's What We've Learned: With Anton Petrov. Anton explores the probability that life may have been carried to Earth from another star system on an interstellar object like 'Oumuamua.
There wasn’t much opportunity to study either ‘Oumuamua or Borisov. They were identified as ISOs by theirhyperbolic excess velocity.That means an object has the right trajectory and a high enough velocity to escape a central object’s gravity. In this case, the central object is, of course...
Interstellar space is not empty but filled with gas, dust and energetic particles. We explore this cosmic medium in more detail here.
Is the Universe Symmetrical? What Is Stellar Nucleosynthesis via Nuclear Fusion? How Did We Learn About the Problems Around the Hubble Tension, Hubble's Constant, & the Age of the Universe? What Are Cosmic Rays and What Do They Reveal About the Universe?
'Oumuamua is the interstellar object first sighted by by Robert Weryk with the Pan-STARRS telescope on October 19, 2017. It had already made its closest approach to the Sun and was moving away from it. It is currently between the orbits of Saturn and Neptune, heading out of the solar ...
The interstellar gas includes neutral atoms and molecules and charged particles like ions and electrons. This gas has an average density of approximately 1 atom per cubic centimeter, which is extremely thin. “Even though the interstellar gas is very dispersed, the amount of matter adds up over ...
” Interstellar space is the region outside the heliosphere–the protective bubble created by solar winds. That protective bubble drops off when the force of the solar winds is counteracted by interstellar winds. Voyager 1 and 2 both left the heliosphere and are now in interstellar space. ...
Some nebulas are formed when gas and dust are thrown out during a supernova—an explosion of a dying star, while other nebulas form through clouds of cold interstellar gas and dust. When these regions become dense enough they can spawn new stars, which is why nebulas are sometimes referred ...
Its official name is thus Ⅱ/2017 UⅠ,with the “I” standing for interstellar(星际)—the first time this name has ever been used. That is exciting. Some scientists,though,entertain an even more exciting possibility what if Oumuamua is not an asteroid(小行星),as most think,but an alien(...