Dwarf galaxies—with a mass equal to about a billion suns, but often considerably less—are the most abundant in the universe. However, because of their low luminosity, they are very difficult to detect. They have mostly been discovered in the vicinity of the Milky Way, in what is called the Local Group, but also, and in […]

Astronomers have confirmed that one of the fastest-changing stars ever observed has entered a new stage of its evolution, offering a rare opportunity to watch a star’s life unfold on human timescales.

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The United States has confirmed for the first time that it has deployed weapons in space, a remarkable revelation after previous warnings about countries such as Russia possibly weaponizing a global frontier long agreed in treaties to be used for only peaceful purposes.

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Scientists from Trinity College Dublin have developed a way to unravel changing weather patterns on distant worlds. Using this approach, they discovered that the weather on a well-studied brown dwarf, SIMP 0136, previously linked to northern lights-like phenomena, is largely shaped by just two dominant processes: changes in temperature and the vertical structure of its […]

The sun is the reason life exists on our small, blue planet. It provides solar radiation that warms the planet and ignites intricate biochemical processes like photosynthesis, producing oxygen for life to breathe. However, while the sun is known for giving life, it can also take it away with solar flares, geomagnetic storms and solar […]