31 January 2013

Full Moon rising

We take an unusual look at our nearest neighbour in the Solar System, the Moon. Watch it rise, with some unanticipated activity in the foreground, and then ponder some things you may not have considered before.

Full Moon
This remarkable video by Australian Mark Gee shows the Moon rising in an unexpected way in the New Zealand evening sky. There are many things to notice about this scene and I'll go through them below the embedded video. But please watch it first, you will not be disappointed!

You can watch it right here on the page. But I strongly recommend that you click the full screen control (the four arrow symbol at bottom right) and if you have a good internet connection, also make sure you view it in HD.

Come back here after you watch it, scroll down the page a little, and we'll talk about what you have just watched.



Big Moon or small people? - Mark was using a good telephoto lens here. Imagine looking at a nearly full Moon rising above a distant hill line with people walking along the ridge. They'd be silhouetted against the bright Moon but they be almost too small to see. In this shot both the Moon and the people are magnified by the same amount.

Fuzzy and shimmering Moon - Look at the edge of the Moon. Do you see the constant disturbance of what would should be a sharp and smooth edge? This is due to temperature differences along the line of sight. The density and refractive index of the air depend on temperature. You can see the same effect above a road surface on a hot day, or above a hot roof. Objects behind the shimmering air wobble and move continually.

Steady people - Take a careful look at the people and the grass and the fence line. Are they shimmering too? No! But why not? The answer may not be immediately obvious. There's a great distance of air between the camera and the Moon, much less between the camera and the people. Most of the disturbed air is way beyond the people, between them and the Moon.

Where's the Sun? - As a full Moon rises, the Sun sets on the opposite horizon. At times other than full Moon this is not the case. Sometimes both Sun and Moon will be in the sky at the same time. At other times both may be below the horizon. New Moon, when they are both in the same part of the sky, is a good time for astronomers because the sky is nice and dark all night long.

So why is there no sunlight? - If the Sun is setting as the full Moon rises, why can't we see its light on the people and the vegetation? If you'd been there at the time you'd have thought the sky was quite light, there may indeed have been a lovely glow behind you as you looked at the Moon. But the full Moon would have been brighter than the remaining light from the Sun and the camera was set to record the Moon, not the people.

Also, this Moon is not perfectly full. Notice that the right-hand edge of the Moon is sharper and brighter than the left-hand edge. The Sun had already dipped below the horizon before the Moon made its appearance.

Isn't the Moon moving the wrong way? - In the UK where I live, the Moon moves steadily to the right as it rises. But this Moon moves steadily left! Why? It moves to the right in the USA too, and indeed anywhere north of the equator. But in the southern hemisphere the Moon moves left. If you're a northerner imagine standing on your head. Now which way would the Moon seem to move - left or right? It moves from east to west wherever you live.

And it's upside down! - Indeed it is. But so are Australians. Or we northerners are, it depends who you ask.

It's more yellow than I expected - That's because it's made of well-matured cheese. I thought everyone knew that.

The real reason is that we are looking at it through a lot of atmosphere. Air scatters blue light (which is why the daylight sky looks blue). Near the horizon both the Sun and the Moon appear yellow or orange, or even reddish. As they rise higher they have less and less air to shine through so the orange effect is lost and a Moon high in the sky appears white (though in fact it's a rather dark grey). The night sky is dark and the Moon appears intensely white because of the high contrast.

More about the video - Mark Gee tells the story of making this video in his own words; it's well worth reading so do go and take a look. Mark's video was made on 28th January and featured on 'Astronomy Picture of the Day' (APOD) on 30th January.

Questions:

  • We live in a truly astounding universe. What is the most amazing thing you have ever seen?
  • Are you surprised to see how fast the Moon rises?
  • How do you feel when you watch this video?

See also:

30 January 2013

Psalms 22 and 23

Psalms 22 and 23 seem to be inextricably linked, death on the one hand and life on the other. Jesus received one, we receive the other. This post digs a little deeper as it examines these two psalms and those around them.

New life springing upA few weeks ago I was reading Psalm 22 which is full of references to the coming Messiah.

There are passages here that Jesus quoted about himself and there are descriptions of him in his bodily suffering and emotional torment. We'll come back to some of those things in a moment.

But what struck me quite suddenly and forcefully was how this psalm is followed by Psalm 23, a firm favourite for so many people.

Psalm 22 is about Jesus' suffering and where it will finally lead, Psalm 23 is about our inheritance as our Father's children. These two psalms are like mirror images of one another. Psalm 22 describes what we deserve but Jesus received. Psalm 23 describes what Jesus deserves but we receive.

Illuminating our hearts and minds - These two psalms would not have been seen that way when they were written, of course. But from the days of the early church right down to our own time they have had the potential to illuminate our hearts and minds in a new way by what they proclaim. And Yahshua himself clearly saw them in this way during his life and particularly as he was hanging on the cross.

I dare say it's been pointed out many times, but I was really excited to have seen the link between these two psalms. Isn't it amazing how he reveals truth while we read and consider his written word? This, of course, is just one of the avenues the Holy Spirit uses to illuminate our hearts and minds.

I wondered if this idea might be taken further.

Psalms 1 to 21 are full of references to Old Testament themes. There are references to creation, the  tabernacle and the temple, and so much more. But Psalm 24 describes the kingdom of heaven. And Psalm 25 and following unpack some of the details of this new kingdom life and inheritance.

But let's return to Psalms 22 and 23. Some of the words and imagery are very familiar to us.

Death in Psalm 22 - Take, for example, Psalm 22:1 'My God, my God, why have you forsaken me?' It's worth mentioning that the Hebrew word translated 'God' is 'Eli' which is related to 'Eloh' and the plural 'Elohim'. The word simply means 'Mighty One' or 'Powerful One'. It is in fact the same word as 'Allah' in Arabic which also means 'Mighty One'. A good translation in English is simply 'Almighty'.

When Jesus quoted this verse from the cross they thought he was calling Elijah because the sound is similar. (Elijah means 'Yah[weh] is the Mighty One'.)

The onlookers shouting at him while he was hanging there unwittingly fulfilled Psalm 22:7-8. Psalm 22:14-18 is a very clear reference to the crucifixion. From verse 22 onwards the psalm turns from his death to what was achieved by it.

Life in Psalm 23 - But Psalm 23 deals with the personal benefits we receive individually in Christ. If we are not in him we have no part in these things although they're available to all who will come to him and believe on his name for rescue. Just as words from Psalm 22 were on Yahshua's lips as he hung dying, so words from Psalm 23 should be on our lips as we live this more abundant life that he gives us.

All these things in Psalm 23 were his, but now they can be ours because he longs to share them with us. He will be our Shepherd, leading us to safe places to eat and drink. A Shepherd makes all the difference, the sheep can safely feed even with a prowling lion in the area. He pours his Spirit over us like oil and we can live with him, not only 'all the days of [our] life' but 'for ever'.

Jesus is new Life springing up in a cold, dark world. Thank you, Lord! HalleluYah!

Questions:

  • What, for you personally, is the most meaningful thought in Psalm 22?
  • And what, for you personally, is the most meaningful thought in Psalm 23?
  • Apart from the snowdrop, what other examples of new life can you identify in the natural world?

See also:

27 January 2013

Icy pond in St Neots - IMAGE

(Click the photo for a larger view)

An icy pond in the Riverside Park - Photo taken 22nd January 2013
We've had some quite cold weather recently in St Neots, with several light falls of snow. But now the temperature has risen and heavy rain last night washed the last of the snow away.

The photo shows things as they were just four days ago, but now there's squelchy mud everywhere. The first snowdrops are in flower and are early signs that spring will soon be on its way.

See other image posts.

24 January 2013

What are we called to do?

Rhoda PickensToday we have a guest post from Rhoda Pickens, who blogs from Wales in the UK at 'Living to please God'.

She brings us some great thoughts about how we can discover our role and function in the body, and how we can be more sure about it. Do you ever wonder, 'Am I living the life the Lord wants for me?' Rhoda investigates some useful pointers that help us examine ourselves and find a secure sense of direction.

How Do We Know What We Are Called To Do? - Rhoda Pickens

We all have things that God wants us to do, but how do we know what?

‘For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand that we should walk in them.’ (Ephesians 2:10)

There are some callings that we all have as Christians:

  • To seek God’s glory (1 Corinthians 10:31)
  • To seek to become more like Christ (Matthew 6:33)
  • To seek the furtherance of Christ’s kingdom here on earth (Matthew 6:33, Matthew 28:19)
  • To disciple others and teach them more about Him (Matthew 28:19,20)
  • We should aim to be ‘fruitful in every good work’ (Colossians 1:10)

But there does seem to be a pattern in the Bible of some people being specifically called to certain things, for example when He said to Abram to leave his country and family and to go where He told him.

It doesn’t record this of everyone though, so I don’t think everyone should necessarily seek a specific life calling. But I believe there are things that God has set aside for us to do so we should be praying that God would lead us to those things.

An area where I do believe we need to seek a call also, is for full time ministry. When we are in the trenches we want to know that God called us to be there so that we don’t go running home. Also we want to know God will provide our needs because He has called us to do that work.

How do we know what God might be calling us to? - Here are a few thoughts on this, though there may well be more to it than I have mentioned!

Look at your gifts - The Bible tells us to use our gifts, so if we are gifted in a certain area, at least spiritually anyway, then we should look for opportunities to use them. This may well lead you eventually to an area that God is calling you to work in.

‘As each one has received a gift, minister it to one another, as good stewards of the manifold grace of God.’ (1 Peter 4:10)

Be willing to do what He wants you to do - It is all very well asking God to show you what He wants you to do, but if you’re not willing to do it then there may not be much point in Him telling you!

Isaiah’s call is often quoted in the Bible, but it starts not with God calling Him specifically, but asking openly, “Who will go for Us?” and then Isaiah says “Here am I! Send me.” (Isaiah 6:8) Isaiah was obviously willing and available to do what God was wanting done.

Ask God what He wants you to do - This may sound obvious, but often people don’t really take the time to pray about what God is wanting them to do with their lives. I know I didn’t until I was in the second year of university and I started feeling restless and then I started praying. Before that I was just headed in the direction of the combination of my parent’s and my decision making.

‘If any of you lacks wisdom, let him ask God, who gives generously to all without reproach, and it will be given him.’ (James 1:5)

A few tips for asking God:

  • Retreat - Try to get away from daily life to spend time with God. It is often when you are out on a long walk or up on the mountain side like Jesus, or at a retreat, that you can understand more how God is leading you.
  • Read the Bible – it is God’s word, so if we want to find His will we should definitely be reading it, and asking God to speak to us!

God may work through your desires - Often God will give you a burden for a specific people or place, or make you feel restless. I wouldn’t use this alone to guide me, but it can be a way that God prods you, like Nehemiah who sat down and wept when he heard that the wall of Jerusalem was broken down and its gates burnt with fire. That eventually led to him going back there to lead the rebuilding.

I think you do need to be careful with this one though, as your desires can also lead you the wrong way!

Give it time - Jim Elliot spent several years seeking direction from God before he finally had the peace he wanted about knowing that tribal work in South American jungles was his general purpose. It can take time.

Don’t think about your ability or lack of it - I love what Chuck Smith says, that God doesn’t want your ability, but your availability. He will provide all we need, just like He did with Jeremiah:

“Do not say, ‘I am a youth,’ for you shall go to all to whom I send you, and whatever I command you, you shall speak. Do not be afraid of their faces, for I am with you to deliver you.” (Jeremiah 1:7-8)

Godly counsel - Just like with all guidance, godly counsel is very useful. Again we have to be careful with this one because well meaning Christians can try to persuade us away from what God is calling us to do! Try to find someone who has surrendered themselves, is serving God wholeheartedly and has some experience in the faith.

I liked what Pete Fleming said: ‘I think a call to the mission-field is no different from any other means of guidance, a call is nothing more or less than obedience to the will of God, as God presses it home to the soul by whatever means He chooses’

And I think that if you are really wanting to do God’s will, and persevere in prayer, then He will show you what He is calling you to – though it may take more time than you thought!

Questions:

  • Are you clear about he Lord's calling on your life or are you just drifting?
  • In your circumstances, which of Rhoda's points did you find most helpful?
  • Will you be putting these ideas into practice? If so how and when?

See also:

22 January 2013

From the beginning to atoms

The universe, Part 4
< In the beginningSeries index | Penzias, Wilson and some noise >

The universe grows larger, cooler and more complex at astonishing speed until it's a few minutes old. Further change is much slower and less dramatic. Fundamental forces and particles are generated, hydrogen and helium are formed and light is released.

The cosmic microwave background radiation
The first few minutes of the universe's existence see a huge increase in volume and a dramatic reduction in temperature. Gravity, light, and atomic forces separate from one another. And finally matter comes into existence in the form of hydrogen and helium nuclei and electrons.

More fundamentally we could say that the universe evolves from a simple, evenly distributed beginning and generates greater and greater complexities confined to smaller and smaller volumes as it expands. We'll explore this concept in a later post.

In Part 3 we discussed the beginning but also understood that we can't directly understand or observe it. A good theory of quantum gravity might help, but we don't have one yet.

So how near the beginning can we claim to have any real understanding? The answer is back to 10-43 of a second. If you want to see that as an ordinary fraction you would need to write 1 at the top with 1 followed by 43 zeroes at the bottom. So we understand the universe (in some sense) back to a very, very tiny part of a second.

What exactly do we know from that very early time?

Gravity and inflation - For one thing, gravity and the other fundamental forces may have all been of equal strength at first, with gravity separating out at 10-43 seconds. There is theoretical support for this. After gravity separated to become the very mild force it is today, the universe entered a time of extremely rapid expansion known as inflation.

This is not just something scientists have dreamed up; the observed properties of the universe can only be explained by such a rapid inflation during which it became unimaginably larger in a tiny, tiny fraction of a second. Before inflation the universe was smaller than a sub atomic particle. Inflation ended between 10-33 and 10-32 seconds, but by this time the universe was spacious (perhaps as large as a football) and packed with elementary particles that still exist in our own time - quarks, antiquarks and gluons.

How do we know all this? There are three important things that constrain what is possible.

  • Theory - Based on what we know of the later universe, theory rules out most hypotheses about the earliest eras. Only an early universe similar to what is described above could have resulted in what we see today.
  • Cosmology - Observations suggest a great deal. The cosmic background radiation (shown above) and the distribution of galaxy clusters, for example, can only be explained by inflation.
  • High energy physics experiments - By creating high energies in particle accelerators we can observe the properties and behaviour of particles in a similar state to these early phases of the universe.

Here's one more thing about inflation. If, as many think, our universe began as a quantum fluctuation, then without inflation it would have been the most transient of fluctuations and the universe would have been snuffed out almost immediately while it was still very tiny.

The electroweak epoch - The next stage in the evolution of the universe involved the strong nuclear force separating from the remaining two fundamental forces. Like the earlier events, this too happened at a very early time, around 10-34 seconds. More particles were able to condense out of the soup of energy at this stage, W bosons, Z bosons and Higgs Bosons became common. These are particles that can be generated in our most powerful accelerators today, so we are able to study them and understand them reasonably well.

The universe continued to expand and cool so that by 10-12 seconds bosons could no longer be created. 10-12 seconds is also called a picosecond (one quadrillionth of a second). Lasers with pulses as short as a picosecond are used for cutting and shaping materials, in medicine, and for removing tatoos. It's still a very brief time, but meaningful enough for real life use. Light travels just 0.3 mm in this time.

The quark, hadron and lepton epochs - The universe continued to expand and cool. After it was a picosecond old the electromagnetic and weak forces separated and the universe at this time was full of a dense quark-gluon plasma.

By the end of this epoch at around a microsecond old (one millionth of a second), the universe was cool enough that the quarks could combine to form protons, neutrons and their anti-particles. At an age of about one second the universe was cool enough for particles and anti-particles to annihilate, leaving a small excess of protons and neutrons.

As the universe expanded and cooled further and aged to about ten seconds, electrons and other leptons were also able to annihilate with their anti-particles leaving a small excess of mostly protons, neutrons, electrons, and photons.

Over the next few minutes conditions cooled to a point where atomic nuclei could form, mostly deuterium and helium with a little lithium. At this point the universe contained these nuclei, protons, electrons, and photons. After a further 380 000 years of cooling and expansion the protons and other nuclei combined with the electrons to form hydrogen and helium atoms (and some lithium atoms). This allowed the photons to move freely (the cosmic microwave background radiation), space became transparent and the earliest structures formed. These structures were simply volumes of slightly varying density and temperature. They are the first things we can 'see' directly and are shown in the illustration at the top of the article.

From this point on the universe becomes more and more recognisable to us, albeit still far hotter and denser than today. We will be able to see the rest of the story much more in terms of astronomy.


Questions: 
  • Are you surprised at the amount of change that took place in the first second?
  • Is the creation of the universe more complex than you had imagined?
  • How do you feel about a universe that started this way?

See also: 


< In the beginning | Series index | Penzias, Wilson and some noise >

15 January 2013

Cornerstone - Unexpected meeting

< 8th January 2013 | Index | No later items >

Meeting up again to think and pray about a house of prayer, Chris and I were pleased to meet another friend unexpectedly. Although we didn't spend the time as we had intended, there was a sense that we had spent it as Father intended. And that is far better!

Unexpected, yet glorious light
Chris and I had agreed to meet at Cornerstone again for more focussed prayer towards the goal of a house of prayer for St Neots.

I arrived first, ordered a coffee, and sat reading, praying, and chatting with the staff. After I'd been there a while I noticed someone coming from the healing room. It was Tendai.


She joined me for a drink and we exchanged news for a few minutes. Then Chris arrrived and I introduced my two friends. As I did so I felt there was something significant in our meeting like this, it seemed just right, perhaps even prearranged, as if we were here for a greater purpose. When I mentioned this later it seemed that Chris and Tendai both felt the same. Sometimes the light in our lives can be quite unexpected, yet glorious.

Exchanging information - She told us about some of the encouragement they are getting from offering hugs and a listening ear on the street in town. People are sometimes asking for prayer now. This idea comes from Chris Duffett and is a wonderful way of engaging with everyday people in everyday ways, reaching deeper into their hearts and minds meaningfully, making people smile, encouraging them and making the most of fleeting moments.

We in turn told her about the house of prayer idea and about Ffald-y-Brenin and The Grace Outpouring and the idea of speaking a blessing over people, places, and organisations.

After Tendai had left, Chris and I chattted a little longer and blessed Cornerstone and even the pavement as we walked back to the Market Square.

Questions:

  • Are there times in your life when the unexpected has been better than the expected?
  • How important is it that we network with one another?
  • Are you praying for the place where you live? If not, could you?

See also:


< 8th January 2013 | Index | No later items >

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