The mechanism of the birth of the universe from nothing! Bigbang mechanism! One of humanity's ultimate questions is "How did the universe come into existence?" Since energy is one of the most fundamental physical quantities in physics, and particles and the like can be created from this energy, this question is "How did energy come into existence?" It is related to the question we are asking. Cosmology can be largely divided into a model in which energy has continued to exist and a model in which energy is also created. Each model has its strengths and weaknesses, but in the model that ass ..read more

Thought this was very interesting and informative. Being a layman I can’t vouch for its accuracy. I looked it up because I heard that the Milky Way is located within a cosmic void. https://en.m.wikipedia.org/wiki/Void_(astronomy) This line intrigued me. What do they mean by this and why should there be a difference? Quote: Cosmic voids contain a mix of galaxies and matter that is slightly different than other regions in the universe ..read more

A decently common theory is the idea that there are an infinite number of universes, in something called the multiverse. This implies that there is a universe for everything. If this statement is true, then that would mean that another universe managed to invade our universe at this very second, because an infinite number of universes means an infinite number of possibilities. If said theory is true, then there should be an infinite amount of universes invading our universe at this very second. Because this isn’t happening, this leads to the final conclusion that there isn’t an infinite number ..read more

The resolution of M87's black hole, which was derived from the Event Horizon Telescope, has been enhanced by a machine learning program*. The result is a more narrow and well defined ring, which should allow more accurate measurements of various aspects of this and other black holes imaged by such means. "The Image of the M87 Black Hole Reconstructed with PRIMO" * https://iopscience.iop.org/article/1...41-8213/acc32d ..read more

Has a supernova ever been recorded? I mean with a telescope? I'm used to seeing images from Hubble or JWST but I've never seen videos. Are these telescopes capable of generating videos? If they're not, would it be possible to connect an earth-bound telescope to a video generating device and record what it sees? If so, could it be directed to a star expected to go supernova very soon and just record until it happens? What would it look like ..read more

All of the experts I've seen/read have been presenting the Cepheid variable graph and the conclusions as gospel, but I've been uneasy with this for some time. I'm hoping that someone may be able to point out where my logic is failing me... Regarding the famous Leavitt's Law/distance vs. speed graph ... there is definitely a correlation between the measurements. Text books and cosmologists state that this means “The further away a galaxy is, the faster it’s moving away from us”. This statement logically leads to the conclusion that the galaxies are moving away from us at an increasing rate th ..read more

With a cylindrical habitat orbiting Earth to create Artificial Gravity (AG), how does a human experiencing AG not become nauseous. I imagine looking at any part of the structure which is not rotating (e.g. the ends) would be a problem. How would this be avoided if indeed nausea or some other physical disturbance would be induced. Thanks ..read more

Maybe it's just my misunderstanding, but the odds of seeing a distant star seem astronomically low. Here's my understanding of how it works. Please let me know if I've got anything wrong. The light emitted from stars are photons. Photons travel through space as waves. These waves are no different than the waves of any other particle described by the wave function of quantum mechanics. That is to say, they describe the locations where the particle is most likely to be if one attempted to measure their location. By the time a photon from a distant star reaches my eye, the wave spans a vast a ..read more

I want to define a point in Space 2400Km above Earth where a fixed object will have the maximum line-of-sight viewing from the surface of Earth (it may not be visible from all latitudes I think unless itself has an orbit parallel to Earth's axis). Not very good at all that maths! The object is orbiting the Sun but not Earth (Sun synchronous orbit?). As Earth spins everyone gets to see (eyes) the object within 24hrs. The object has its own power to maintain position and I assume it would take considerable power to maintain that position and it would be nice to know what energy would be required ..read more

NASA's Mars Reconnaissance Orbiter has observed the recent appearance of a crater chain produced by a meteoroid as it broke up just prior to impact (1). The event was the first observed using seismic detection by NASA's InSight lander, and then confirmed by the Reconnaissance Orbiter. After noting the features of the impact data, the InSight team was able to determine that other impacts had also been recorded, but not previously identified. More details from the abstract of the original article can be found at Nature Geoscience (2). "NASA's InSight 'Hears' Its First Meteoroid Impacts on Mar ..read more