WHERE DID THE ANTIMATTER GO?
It was destroyed after the Big Bang
Antimatter and matter are supposed to be created in comparable abundance. However, almost all matter observed from Earth seems to be made of matter rather than antimatter. Where did the antimatter go? Antimatter was either destroyed within a second after its creation in the Big Bang, or the Big Bang made antimatter in a distant universe that is far beyond our reach and our visible world happens to be in a matter zone.
The first possibility could be caused by a possible tiny asymmetry between matter and antimatter, and it is being studied by accelerator experiments. The second possibility is being explored by balloon and space-based experiments - a recent famous one is the AMS-02 experiment mounted on the International Space Station. In those experiments, scientists are looking for tiny fragments of primordial antimatter in cosmic rays. Dr Aihong Tang, Brookhaven National Laboratory, New York
WHY DO CRAFT SPEED UP NEAR EARTH?
It may be due to Earth's spin
Possible effects include the atmospheric drag of low-orbit trajectories, ocean and solid tides, charging and magnetic momentum of craft by solar wind, overlooked general relativity phenomena or thermal radiation. Or perhaps it's a strange dark matter halo around Earth. Also perplexing is the phenomena's disappearance in flybys since 2005. Dr Luis Rodríguez Universidad de Extremadura, Spain
CAN LIGHT ESCAPE BLACK HOLES?
Theory says that it can
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Diese Geschichte stammt aus der Issue 128-Ausgabe von All About Space.
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"We knew that this would be a historic comet"
Astronomer David Levy was immortalised for his co-discovery of Comet Shoemaker-Levy 9 – its impact with Jupiter 29 years ago held the world in awe
CELESTRON STARSENSE EXPLORER DX 102AZ
Innovative technology provides the simplest and quickest solution yet to finding objects to observe, and this instrument will be very popular with beginners
MOON TOUR - COPERNICUS
Get up close to the ‘Monarch of the Moon’
A HUNGRY BLACK HOLE 'SWITCHES ON' AS ASTRONOMERS WATCH IN SURPRISE
J221951 is one of the most extreme examples yet
MYSTERIES OF THE UNIVERSE - WHY DOES JUPITER CHANGE COLOUR?
For years, scientists have tried to work out why Jupiter’s bands frequently move and change colour. Now they believe they’ve found the answer
MARS HELICOPTER PHONES HOME AFTER A 63-DAY SILENCE
Rugged terrain had kept Ingenuity from communicating with its robotic partner, the Perseverance rover
SIX OF THE BEST SPACE PRANKS
It turns out that the sky isn’t the limit when it comes to a good old-fashioned practical joke
CLIMATES CHANGE IN THE SOLAR SYSTEM
Alongside Earth, our planetary neighbourhood is changing. But not for the better…
TIME APPEARED TO MOVE FIVE TIMES SLOWER IN THE FIRST BILLION YEARS AFTER THE BIG BANG
Time dilation, brought about by the relativistic expansion of space, has resulted in the observed slowing of ‘clocks’ in the early universe
WHAT CAN WE DO WITH A CAPTURED ASTEROID?
Asteroids could provide us with rare resources