Tag Archives: moon

Lunar collision

Spoke to Richard Glover on ABC702 Sydney about NASA’s LCROSS spacecraft is preparing a violent return to the moon later today as part of a mission to send a satellite and a rocket booster crashing into the lunar surface to look for water.


A Frown In Space

Monday night provided one of those quirky astronomical moments when a few heavenly bodies aligned. It got a lot of media exposure. Find evidence of ice on Mars or volcanism on Mercury nothing new. But two planets and the Moon make a smiley face in the sky – wow get out there quick.

Well as usual the sky at my place was clouded. I went outside the following night and was rewarded with the Moon a little higher. I turned my head upside down and was rewarded with a frown. Hey!

Interesting story I heard today on ABC World Today was about the possible extinction of the white possum. Listen to the audio, especially when the reporter questions whether he has being ‘irresponsible’.

Another story on ABC radio was about the ‘Dance your PhD’ competition, which featured an Australian winner. See it on YouTube.

Posted with LifeCast

Total Solar WOW!

On 29 March, the Moon passed in front of the Sun for nearly four minutes, and day turned into night. I visited Turkey to watch the 2006 total solar eclipse -a rare event and one that I watched with several million people across Africa and Eastern Europe.

What happened?

A total eclipse of a Sun begins when the Moon first begins to move in front of the Sun. For the next hour, more of the Sun disappears and looks like a crescent. On 29 March, this started around 1 pm. Within thirty minutes the light around us began to fade and the temperature dropped from 20 to about 14 degrees Celsius.

People watched the Sun, through their special eclipse glasses As thesky got darker and birds flew into trees thinking it was night. Stars began to appear in the Sky – I even saw Venus. A dog in the street was quite confused and didn’t know what was happening.

Then just after lunch at 1.55 pm, the last piece of the Sun was covered by the Moon and the sky turned black. We took off our eclipse glasses and could see the ghostly haze of the Sun’s corona around the black circle of the Moon. People were cheering and clapping. The Sun was completely hidden by the Moon. For exactly three minutes and forty-five seconds we looked at the total eclipse of the Sun. The horizon in all directions had a red glow, looking like the Sun at set in every direction.

Suddenly a bright flash occurred – it was the Sun reappearing from behind the Moon. Many people call this the diamond ring. The bright white light of the Sun meant we had to put our eclipse glasses back on.

For the next hour, the sky became blue and the air became warmer. Birds flew back into the sky. The total eclipse was ending. By 3 pm, the Sun was no longer covered by the Moon and everything was back to normal.

It was an amazing sight to see in a beautiful country. Like many ‘eclipse chasers’ I’m already thinking about when I will see my next one.

You can read more about my trip to see the eclipse, including Gallipoli and Cappadoccia, by visiting www.abc.net.au/science/features/turkisheclipse.html.

Why in Turkey?

I had to go all the way to Turkey to see the total eclipse because total eclipses of the Sun can only be seen along a small path of the Earth. This is because the Moon and the Sun must be perfectly lined up. If you were more than 100 kilometres to the east or west from where I watched the eclipse you would not have seen it.

People in central Africa, Libya, Turkey and Georgia were able to see the eclipse. If you were in Egypt, Eastern Europe or the Middle East, you may have seen a partial eclipse of the Sun.

When are the next total eclipses of the Sun?

  • 1 August 2008 – Siberia, Northern China
  • 22 July 2009 – China, Japan and Kiribati
  • 11 July 2010 – Chile
  • 13 November 2012 – Darwin and Cairns

Discover more about eclipses of the Sun and the Moon.

Lunar lunacy

For centuries humans have looked up at the night sky and seen the Moon. Some people believed it was a frozen world with Moon creatures, others believed that you could see a face – the ‘Man in the Moon’. Today, we know that our nearest neighbour is much simpler than that.

FACT: 12 people have walked on the surface of the Moon. The first person was Neil Armstrong in July 1969. The last person was Eugene Cernan in December 1972. NASA has plans to send astronauts back to the Moon in 2018.

A grey desert

The Moon has no air water or life. It’s a bit like a giant sand pit – expect the sand is grey and feels like powder.

‘Buzz’ Aldrin was the second person on the Moon. You can see an image of Neil Armstrong reflected in his visor. CREDIT: NASABecause there is no atmosphere, visitors to the Moon need to wear a spacesuit to create earth-like conditions. The spacesuit carries air for breathing, and protects them from extremes of outer space. In direct sunlight, the temperature is 140 degrees Celsius, and in the shade it’s a freezing -100 degrees Celsius!

FACT: From Earth we only ever see one side of the Moon. The ‘far side’ was first seen in 1959 when the Russian spacecraft ‘Luna 3’ flew behind the Moon.

The Moon and our calendar

A ‘lunar month’ is the number of days between one Full Moon (when it is completely lit) and the next. This is 29 days.. During a lunar month, it changes from being fully lit (Full Moon), to not lit at all (New Moon) and then back to fully lit. In between, the Moon may appear as a crescent, half lit (first or last quarter) or a ‘fat’ gibbous (oval) shape.

Many cultures use the Moon’s phases to set their calendars and dates for events.

For example, Chinese New Year is usually celebrated on the night of the second New Moon after Christmas – during late January or February. In 2006, Chinese New Year occurs on 29 January and will mark the start of the year of the dog.

FACT: Did you know that Monday was originally known as Moonday?

Muslims use the Moon to mark the beginning of Ramadan – one of the most important months in the calendar – which will occur on 23 September in 2006.

In the Earth’s shadow

During a total eclipse of the Moon, it darkens and appears red. COPYRIGHT: Darren OsborneOccasionally the Moon passes behind the Earth and into itsshadow . When this happens, the light from Sun cannot shine on the Moon and it becomes darker – sometimes appearing red or orange. This is called a total eclipse of the Moon.
The next total eclipse of the Moon will occur on 3 March 2007 and can be seen in Africa and Europe. People in Australia, New Zealand and Asia will have to wait until 28 August 2007.

Daytime planets

Did you see Jupiter next to the Moon on 16 June 2005? In the northern parts of Australia, Jupiter passed behind the Moon for a few minutes. CREDIT: Darren Osborne
You probably know that you can’t see stars in the daytime, but did you know that you can sometimes see planets or even satellites.

During the day the light from the Sun is scattered across the sky, giving it a blue colour. This blue light is much brighter than most of the stars in our sky. When the Sun sets, the scattered light is gone and we can see the stars and planets.

Occasionally, the Moon reflects enough light the Sun that it is brighter than the blue sky. This means you can see the Moon during the day.

Planets change in brightness during the year, depending on how close they are to the Earth.

Venus, Mercury, Jupiter and Saturn sometimes appear brighter than the stars at night, and bright enough to see during the day. But it’s not easy. To find these planets you usually need another object nearby, such as the Moon or the horizon.

If you think you’ve conquered the daytime planet seeking challenge, try looking for an Iridium satellite flash. Iridium satellites are a type of satellite that occasionally flash brightly for two seconds. The flash is caused by light reflected on their solar panels. Daytime Iridium ‘flashes’ occur at least once every two weeks, but you need to know the exact time and position in the sky to see them.

WEBLINK:
Iridium flashes – www.heavens-above.com