The night sky will be brighter than usual tonight when a full moon coincides with the moon reaching its closest point to earth.
Known as a 'super moon', or Perigee Moon as astronomers call it, the moon will appear 14% brighter than usual and 30% more than when it is at its furthest point from earth.
The phenomenon is caused by the moon's elliptical orbit. This weekend it will be 50,000km closer to Earth than at the furthest reach of its orbit.
US space agency Nasa says the Perigee full moon has been linked in folklore to a rise in hospital admissions and an increase in crime, but modern studies do not back this up.
However, higher tides than normal are expected.
Mount John Observatory resident superintendent Allan Gilmore said the moon will not appear much bigger to the naked eye, but it will be brighter.
Gilmore said the perigee full moon will be able to be seen in clear skies this evening, and the best time to see it is between 5.30-6pm, as it is expected to rise at 5.23pm.
Aclnowledgements: With Newstalk ZB