The SolarSystem.com News, Space, Science, Technology and Shopping Portal
Back to list of articles The theoretical limit may be what is called the Planck temperature, derived using fundamental universal constants. Workers walk past a section of magnets at CERN's Large Hadron Collider, where researchers are probing plasmas like those that filled the early universe. Credit: Samuel Joseph Hertzog/CERN We all accept that the coldest
Back to list of articles Light from UHZ1 has traveled 13.2 billion light-years – a longer travel time than any other known black hole. This composite image shows the galaxy cluster Abell 2744 as seen by JWST and the Chandra X-ray Observatory. Superimposed on the infrared image of the galaxies is a purple “haze” created
Back to list of articles The duration of the pulsations of these stars is always related to their intrinsic brightness. Astronomers can use this knowledge to calculate the distance. RS Puppis is a Cepheid variable star whose brightness varies by a factor of five approximately every 40 days. Credit: NASA, ESA, and the Hubble Heritage
The Moon rises over the mountains of Utah. Credit: NASA/Bill Dunford. Why does the Moon sometimes appear so large when it rises on the horizon? Ryan FrazBuffalo, North Dakota Ryan refers to the so-called Moon IllusionSometimes, when the Moon is just peeking over the horizon, it appears truly enormous. Some people see it, others don't,
Back to list of articles Artist's impression of a black hole destroying Earth. Credit: ESO/M.Kornmesse What are the chances of dark matter or a black hole tearing the Earth apart? Antonio RicoLexington, Kentucky Our planet is safe from being torn apart by a black hole or dark matter. The gravity between objects in our solar
Return to article list Psyche has a nearly circular orbit in the asteroid belt, so it is unlikely to have come close to Earth. The metallic asteroid Psyche, shown in this artist's concept, may be the exposed iron-nickel core, or a fragment of one, of a larger object in the early stages of the solar
Return to article list The expansion of the universe explains how it can be much larger than 13.8 billion light years. How can the visible universe have a radius of 46 billion light years when the universe is only 13.8 billion years old? And how can we detect light from 46 billion light years away
Return to article list The expansion of the universe explains how it can be much larger than 13.8 billion light years. How can the visible universe have a radius of 46 billion light years when the universe is only 13.8 billion years old? And how can we detect light from 46 billion light years away
How do scientists weigh celestial objects? Mike Sackheim Evanston, Illinois It's true that you can't simply place a planet or galaxy on a scale to measure its weight. Fortunately, astronomers have a few tricks up their sleeves. The first trick is to understand that gravity and mass are inherently linked. It is important to note
