astronomy

Space-time

How the Universe Works: Mystery of Space-time ep.10 2018

Science / 2 minutes of reading / / By

Space-time is the secret structure that controls the universe, and this strange four-dimensional substance controls time, light, and energy. It will also determine how the universe will end.       Space-time In physics, space-time is any mathematical model that fuses the three dimensions of space and the one dimension of time into a single four-dimensional continuum. Space-time diagrams are useful in visualizing and understanding relativistic effects such as how different observers perceive where and when events occur. Until the turn of the 20th century, the assumption had been that the three-dimensional geometry of the universe (its description in terms […]

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Quasar

How the Universe Works: The Quasar Enigma ep.7 2018

Science / 2 minutes of reading / / By

Quasars are the brightest and most powerful objects in our universe, and though they have shaped the cosmos, they might ultimately destroy everything that exists.     Quasar   A quasar (also quasi-stellar object or QSO) is an active galactic nucleus of very high luminosity. A quasar consists of a super massive black hole surrounded by an orbiting accretion disk of gas. As gas in the accretion disk falls toward the black hole, energy is released in the form of electromagnetic radiation. Quasars emit energy across the electromagnetic spectrum and can be observed at radio, infrared, visible, ultraviolet, and X-ray

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Death of the Milky Way ep.5 2018

How the Universe Works: Death of the Milky Way ep.5 2018

Science / 2 minutes of reading / / By

The Milky Way is dying, and experts are investigating what’s killing it.     How is the universe put together? How is it built? And how does it actually work? Science’s hit space series will blow your mind by answering how the universe started and how it will end – and everything in between. Learn how nuclear fusion keeps them burning for billions of years and what powers our nearest star: the sun. The inner workings of outer space will be revealed as modern astronomy helps to demystify a series of unusual phenomena.   Milky Way   The Milky Way

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Oumuamua

The Sky at Night – The Mystery of Oumuamua

Science / 2 minutes of reading / / By

In October 2017, astronomers made a spectacular discovery – they spotted the first ever object to visit our solar system from outer space. They gave it a suitably exotic name… ‘Oumuamua. Its discovery set off a hurricane of press speculation and a major scientific investigation.     To investigate this spectacular astronomical detective story, The Sky at Night goes to Queen’s University in Belfast, which has become the centre of scientific research on this cosmic visitor. When they first spotted it, all scientists knew was that it was small, it was travelling fast, and it came from outside our solar

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binary stars

How the Universe Works -Twin Suns: The Alien Mysteries ep.3 2018

Science / 2 minutes of reading / / By

Planets that orbit two suns instead of one might be deadly hell worlds, but new discoveries reveal that sci-fi star systems with binary stars might be optimal places for alien life.     How the Universe Works is a users guide to the cosmos from the big bang to galaxies, stars, planets and moons. Where did it all come from and how does it all fit together. A primer for anyone who has ever looked up at the night sky and wondered. Binary stars A binary star is a star system consisting of two stars orbiting around their common barycenter.

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The Invisible Universe

The Sky at Night – The Invisible Universe

Science / 1 minute of reading / / By

The Sky at Night – The Invisible Universe: reports on one of the most unnerving discoveries in space science – that most of the universe is missing.     We live in a material world, so instinctively we know what normal matter is – the world around us, the planets, stars and interstellar dust. But scientists currently estimate that 95 per cent of everything in the universe is actually – one way or another – invisible. Some of this is ordinary matter that we just can’t easily see. But there’s also stuff that’s much more weird. For instance, there’s a

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Venus

The Sky at Night – Venus, Earths Twin

Science / 3 minutes of reading / / By

The Sky at Night – Venus, Earths Twin – How can two such similar planets have become so different? One is the crucible of life, the other an inferno with a surface scorched by raining acid, yet both began as almost identical bodies. With Venus prominent in the sky in May, the team explores our nearest neighbour, discovering how it formed and how ESA’s Venus Express spacecraft has revealed the secrets of its atmosphere.     Dr Lucie Green explores what happened to leave Venus with searing temperatures and acid rain, and talks to Climate expert Dr Hugo Lambert about

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