The SolarSystem.com News, Space, Science, Technology and Shopping Portal
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
