This graphic represents the view due east at 7pm GMT on Christmas Day 2015 as seen from the centre of the British Isles, about an hour after full darkness has descended. The rising full Moon lies in the constellation Gemini, just above magnitude +1.9 star γ Geminorum, otherwise known as Alhena. This is the first time since 1977 that a full Moon has fallen on 25 December and the next time it occurs is 2034, so hopefully it will be clear! AN graphic by Ade Ashford.December’s full Moon, the last of the year, is called the Full Cold Moon because it occurs during the beginning of winter. The instant that this month’s full lunar phase will occur is 11:11am GMT and it will rise at 4:32pm GMT as seen from the centre of the British Isles.
As you gaze up at the Christmas Moon, take note that NASA has a spacecraft currently orbiting Earth’s only natural satellite. NASA’s Lunar Reconnaissance Orbiter (LRO) mission has been investigating the Moon’s surface since 2009.How the Moon will appear on 25 December 2015. Image credits: NASA/Goddard/Lunar Reconnaissance Orbiter.“As we look at the Moon on such an occasion, it’s worth remembering that the Moon is more than just a celestial neighbour,” said John Keller, NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “The geologic history of the Moon and Earth are intimately tied together such that the Earth would be a dramatically different planet without the Moon.”
LRO has collected a treasure trove of data with its seven powerful instruments, making an invaluable contribution to our knowledge about the Moon.
If skies are clear at dusk in Western Europe and the UK on Tuesday, 19 February, be sure to glance up at the full Moon in the constellation of Leo. If the lunar orb seems a bit larger than usual then you’d be right, for this is the closest full Moon of 2019. Since it occurs just 6¾ hours after lunar perigee, it’s also a supermoon. And if it’s cloudy, you can watch online!
Although we are unaware of it in our everyday lives, the Earth’s rotation is slowing down, so each mean solar day is about 0.002 seconds longer than the last. NASA explains why Tuesday, 30 June 2015, will have an extra second, or “leap” second, added.
Immediately after its 2008 launch, NASA’s Interstellar Boundary Explorer, or IBEX, spotted a curiosity in a thin slice of space: More particles streamed in through a long, skinny swath in the sky than anywhere else. The origin of the so-called IBEX ribbon was unknown — but its very existence opened doors to observing what lies outside our solar system.