Thursday, October 31, 2013

For those who look up at the stars...........

The New York Times


October 30, 2013

Astronomers Find Earthlike Planet, but It’s Infernally Hot


Kepler 78b, a planet some 400 light-years away, is like hell on earth.
Astronomers described it on Wednesday as the first Earth-size planet that seems to be made of the same mixture of rock and iron as Earth, and that orbits a star similar to our sun.
But Kepler 78b would not be a pleasant place to visit. It whirls around its parent star, Kepler 78, at a distance of less than a million miles, and its year — the time it takes to complete one orbit — is just eight and a half hours. (By contrast, Earth is 93 million miles from the sun and, of course, completes its yearly orbit in a little over 365 days.)
At that close proximity, the surface of Kepler 78b is infernally hot: 3,500 to 5,000 degrees Fahrenheit, or “well above the temperature where rock melts,” said Andrew W. Howard, an astronomer at the University of Hawaii and the lead author of one of two papers being published in the journal Nature. “This is probably one of the most hellish planets that have been discovered yet.”
Viewed from the surface of Kepler 78b, its star would cover 80 times more of the sky than the sun does in Earth’s sky.
“It’s certainly not a habitable planet,” said Francesco Pepe, a professor of astronomy at the University of Geneva and the lead author of the other Nature paper.
Kepler 78b is the newest addition to the pantheon of oddball planets in the Milky Way. The first planet discovered around another sunlike star turned out to be about the size of Jupiter, but orbiting its star at what seemed to be an impossibly close orbit. Other discoveries over the years include a fluffy planet with a density less than that of cork and a planet blacker than coal.
“Exoplanets are just surprising us with their diversity,” said Dimitar D. Sasselov, a professor of astronomy at Harvard and a member of Dr. Pepe’s team, using the name for planets outside our solar system.
Kepler 78b is one of more than 150 planets spotted by NASA’s Kepler spacecraft, which noted the dimming of the starlight when a planet passed in front.
Those findings were published in August. But while Kepler can determine exoplanets’ size and orbit, it cannot measure their mass. For that, two teams of astronomers looked at Kepler 78b star from Earth. Dr. Howard’s team used the Keck 1 telescope in Hawaii; Dr. Pepe’s team used a telescope in the Canary Islands. They could not directly see the planet, but they could spot undulations in the frequency of light from the star caused by the gravitational pull of the planet. The heavier the planet, the larger the swings in frequency.
The teams coordinated their work, agreeing to publish their results at the same time, but they did not collaborate. They decided that they would not exchange their data and answers until their papers were almost complete so that each would serve as an independent check on the other.
In the end, the two teams came up with nearly identical answers. The density of Kepler 78b is 0.2 pounds per cubic inch, the same as Earth’s, suggesting that the two planets’ makeup is very similar — an iron core with rocky, if melted, outer layers.
“It’s the first really well measured Earthlike composition for a rocky extrasolar planet,” said L. Drake Deming, a professor of astronomy at the University of Maryland who was not a member of either team but wrote an accompanying commentary for Nature. That astronomers have already found an Earthlike planet suggests that there should be others in cooler, more life-friendly orbits. “You can reasonably conclude from that that it’s not rare, because you’ve found it pretty easily,” he said.
That still leaves a mystery: how Kepler 78b got where it is. “Right now, we have no clue,” Dr. Sasselov said.
It could not have formed there, because the star as a youngster would have extended into its orbit. A near-miss with another planet could have flung it toward the star, but in that case its orbit would have been elliptical, not circular. Or it was nudged inward by the material that formed the planets.
Another possibility is that it was originally a gas giant like Saturn and that as the planet spiraled in toward the star, all of the gases were stripped away, leaving just the rocky core at the center.
“Right now, this scenario doesn’t work, either,” Dr. Sasselov said. “If you want me to choose out of four bad ones, that’s probably the one which seems least so.”

This reminds me of the cottonwood star story.......

The Secret of the Star…..

Some Native Americans believe all things
come from Mother Earth.

 They believe that stars form in the earth and, when ready,
 search for the roots of the magical cottonwood trees.

They finally come to rest in the small twigs
at the end of the cottonwood branches.

Here, they wait.................until they are needed.

When the Spirit of the Night Sky decides that she needs more twinkling, beautiful stars, she calls on
the Wind Spirit to shake all the cottonwood trees.

The Wind Spirit blows and blows, and, as the cottonwood twigs break off, the twinkling stars are released and race up to a special place in the Night Sky.

If YOU want to add a new star to the night sky, find some cottonwood twigs, wait for a clear night,
and hold up your twigs to the sky –
and SNAP!  

Then, look up into the night sky again.

Can you see YOUR star twinkling?

Imagine

You have added a beautiful new star to the
                    kingdom of the night sky......






John Paull



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Sunday, October 27, 2013

Posting that last NYT article, I just thought I'd put an extract from my activities booklet, I'm a scientist, in my blog......

OK, so…….what is a scientist?
The popular view held by most children is that the world of science is owned by wide-eyed, white-coated ‘boffins’ who spend their time poking in test tubes and looking into microscopes.

I opened my dictionary, looked up the word scientist, and read the following:
A scientist: a person having expert knowledge of one or more sciences, especially a natural or physical science.Mmmmm………not terribly helpful, I thought. That’s not how I would describe what a scientist is to a young child. So, let me make a stab at it. I know, for a start that:
·      Scientists are very curious about what they see around them.
·      Scientists are collectors – they collect things and they collect ideas.
·      Scientists read books to find out more about what they collected.
·      Scientists carry out experiments.
·      Scientists write notes and draw pictures to explain what’s in their heads.
·      Scientists talk with other scientists and learn from each other.
.
I do ALL these things, don’t I? SO, I’m a SCIENTIST! Hey, hey!


We’re ALL scientists……… aren’t we? Don’t we explore our environment in a scientific way, whether we are aware of it or not? Don’t we look, touch, hear, smell, taste and wonder why all the time? Isn’t that how we discover new things?  When we discover something new, we often experience feelings of pleasure. Which of us hasn’t seen an expression of magical delight when a young child makes a discovery? You know, the ‘Oooh…... Aaah ‘ effect?
One thing, though. That magical ‘Oooh..Aaah’ moment needs fanning as if it were the beginnings of a fire, doesn’t it? 

In my experience as an educator, I appreciated quickly that, even though being curious is natural for all human beings, most young scientists need help understanding how to make sense of the science around them. Teachers know that, but, don’t just leave it to your children’s teachers. Who better to help them than mum and dad? Any teacher will tell you that your involvement in your children’s education as a close family member (mother, father, grandparent, carer, home-schooler) is strongly related to their success in school. And that common sense view is backed by educational research:  “What families do is more important to student success than whether they are rich or poor, whether parents have finished high school or not, or whether children are in elementary, junior high, or high school (Robinson, 1995).

I remember how and when I became a scientist, someone who throughout his life has enjoyed exploring and finding answers to the endless questions about the world of nature. It was my parents and one teacher who ignited and fanned my science fire and got me going.

Born in in the southwest part of England, I lived near the sea when I was young. When the weather was nice, Mum and Dad took me to the nearby stony beach of Mount’s Bay. Sometimes we caught the bus and went a mile or two to the abandoned tin mines perched on the cliffs that overlook the Atlantic Ocean.
Description: Description: http://fc01.deviantart.com/fs6/i/2005/082/a/7/Heart_Shaped_Rock_by_speedyfearless.jpgDescription: Description: http://www.teara.govt.nz/NR/rdonlyres/23B64508-97A4-4A35-A3E0-8E7DE80944B0/78901/p5121enz.jpgI remember one day in particular. In fact, I can remember it as if it were yesterday. It was my fifth birthday. I was really surprised when my mum and dad met me at the end of the school day. Holding my hand, we walked to the beach for a birthday treat, especially to search for heart-shaped or dark grey pebbles with a vein of white quartz running through the middle. These pebbles were very, very special. Mum and Dad called them wishing rocks.

I soon spotted a beautiful black and white wishing rock. I picked it up and rested it comfortably in the palm of my hand. I slowly wrapped my fingers around it and squeezed really tight.  When my fingers warmed the pebble, I closed my eyes and sent a really special loving wish to my mum and dad.

Hey,” said my dad, when I opened my eyes, “did you just send me a wish? I felt it, you know, like a warm tickle right down my back. Did you feel that, Hazel?” “I did, I did,” said my mum.
Wow! I thought. It really works! Wishing rocks are brill! And, knowing that, really lit a fire in my head.

Smiling, I put my wishing rock into what Mum called my treasure tin, a small red OXO tin. Then, I spotted something different. There, lying with all the black, grey and white smooth pebbles, was a bright yellow object. It didn’t look like any of the other sea-worn rocks. It stared up at me, wanting, badly I felt, to be picked up, wanting to be touched and admired. I bent over, picked it up and held it in the palm of my hand. I ran over to Mum and Dad. Even though I thought they knew everything, I was really surprised they didn’t know what I had found. “Take it to school tomorrow and show your teacher,” said Mum. “Miss Harvey will know. She knows everything.” Not wanting to scratch it, I wrapped the pebble up in my white hanky and put it in my pocket next to my treasure tin.

As I dressed for school the next morning, I put my treasure tin in my pocket to take to school to show my teacher, Miss Harvey.

Even before all the boys sat in their seats, I was standing by Miss Harvey’s tall wooden desk, the OXO treasure tin in my hand, spluttering, “Miss Harvey, Miss Harvey, see what I found. I found it on the beach, after school, yesterday. Went there with my mum and dad. You know, when the tide was out, when you can see what the waves brought in.”

As Miss Harvey looked inside my treasure tin, her eyes widened. It wasn’t, apparently, a rock at all. It was ancient fossilized tree resin, and, she said, it was called amber. Miss Harvey knew amber was millions of years old and began its life inside a tree.

Resin? Fossilized? Amber? Ancient? What beautiful words, I thought.

Miss Harvey held my golden amber in her hand, smiled, looked down at me through her wire glasses that balanced on the end of her sharp nose, and said loudly, so everyone in class could hear, “THIS is amber…..it’s fossil tree sap………it’s been washed ashore after a long, long trip in the sea. Johnny Paull found it.” Miss Harvey handed the amber back to me and then wrote the word A M B E R on the board. “Show it to everyone, pass it around.” Miss Harvey said. “Share it – that’s what scientists do. And, Johnny Paull, you’re a real scientist!”

What’s a scientist, I wondered? Is that something dead good? I turned a little red as I faced everyone in the room. As I held out my hand and showed the class, everyone stopped chattering. They were curious and wanted to see what I had found. I handed it to Johnny Hoskins. Almost immediately, Edgar James hissed, “Pass it ‘ere, boyo. Quick. Lemme see!” “Quiet, everyone, quiet!” Miss Harvey said, turning to me,  “Johnny Paull, why don’t you draw a picture of your amber? Here, here’s some white paper. Use this. Don’t just draw the amber, draw the other beach pebbles, too. Just as you remember. Can you see them in your head?”

Closing my eyes, I remembered just how the amber looked when I saw it lying on the beach with all the other pebbles. I couldn’t wait to grab some yellow, black and brown crayons from the big biscuit tin lying on her desk.

When I’d finished my drawing and showed it to Miss Harvey, I could tell from her eyes that she liked it. Quickly, she glued the picture onto some black paper, then taped it to the wall close to my desk, and told me to write my name and the date underneath.

As I was drawing another picture of one of my wishing rocks, Miss Harvey came next to me and, with a broad smile, said, very emphatically so that everyone could hear, ”Keep it, Johnny Paull. The amber. Keep it safe. And that wishing rock. They’re wonderful. You’re so lucky. Keep them. Keep them in your oxo tin - your treasure tin, sorry - and save them. Save them forever.”

My head glowed. It was on fire. I was a scientist – whatever that meant! That was it. I was hooked. I’ve been a scientist - and a treasure tin collector - ever since, thanks to my mum and dad and my teacher.

  So, you adults, put on your scientist hats, take the time to positively interact, as learners, as   team players, with your children. Nurture their curiosity – and yours - and their sense of being scientists. Start and fan their fire.

How? Well, flick through the book, check the science activity on each page and see if they are age and ability appropriate for your young scientist, [1] then:
·    Give him/her your time, a worktable, and the resources required for the science activities in the following pages.
·    Help (but, careful, don’t be overbearing!) your young scientist actively engage in the fun science activities.
·    Encourage him/her – when it’s appropriate – to act, think, talk, read, draw and, yes, write like scientists.
·    Appreciate that most young scientists have a need to ask questions about what s/he sees – as talking, it seems, aids understanding.
·    Know that your science discussion with your young scientist will usually raise new and interesting questions, so that one inquiry leads to another.
·    Know that when young scientist uses his/her own efforts to discover something, the flash of  insight seems to give special satisfaction.
·    **   Take your young scientist out on a countryside walk. Remember, though, you don’t need to point out and name everything. Just take a couple of empty tins and ask your young scientist to fill them with anything that catches his/her eye.
·    When you do, show your young scientists your positive interest in whatever they pick up from the ground with your body language, especially your eyes.
·    If you can, provide access to a computer or smartphone so s/he can, if they wish, research science questions.
·    If you can’t, go to your local library and help your young scientist access its children’s science books, its technological and scientific resources.


** When you return from your walk, why don’t you help your young scientist make a pocket museum to display what s/he collected?

Pocket museum? What’s that, then, you might well ask. Well, many years ago, when teaching a class of 10 and 11 year olds, we were sharing their treasure tins at the start of another day. Michael put up his hand and, with a twinkle in his eye, said, “ Like a museum, ain’t it? Me dad says mine’s a pocket museum. Can we call ‘em pocket museums, Mr. Paull? Go on, can we?” Like me, everyone in class thought it was a great idea to rename the treasure tins. And, so, from that day to this, a tin containing a personal treasure is a pocket museum.

Kids love them. Over the years, in loads of classrooms, making and sharing stacks of pocket museums has helped me nurture the excitement and joy young scientists naturally feel when interacting with and learning more about the world around them.
So, how do you make a pocket museum? All you need is a small tin, a piece of felt, scissors, glue, and something really cool your young scientist found on your collector’s walk.
Cut the felt to the size that will fit inside your tin. Glue the felt to the bottom of the tin. Then, glue your best finds on the felt, and, hey, you have your pocket museum – forever.


And, when you and your young scientist are making the pocket museum, why don’t you CAPTURE a Young Scientist MOMENT – forever!

I came up with this idea many years ago when teaching upper juniors:

After a wonderful but windy walk around the woodland near school, my class of ten year-olds began to talk about the afternoon’s experiences. Dianne said how much she enjoyed the walk in the long grass around the trees. “Everything was beautiful, Mr. Paull…………….everything smelled dead good. Did you hear the wind, though? It was making a howling noise and it made the leaves on the trees shake.” Then she added, wistfully, “Pity we can’t bring back the smells and the sounds of nature.
How could we do that, Mr. Paull?”

That made me think. Then I had an idea. If you half fill a plastic bottle with water and then turn the bottle upside down, the water rushes out. For a split second, there’s nothing in the bottle. Then the air rushes in and fills the bottle. The air carries everything ……doesn’t it? J

The next time we went for a nature walk, I took a bottle half filled with water. When we reached the tall grass and trees, I turned the bottle upside down and let the water gush out. As That made me think. Then I had an idea. If you half fill a plastic bottle with water and then turn the bottle upside down, the water rushes out. For a split second, there’s nothing in the bottle. Then the air rushes in and fills the bottle. The air carries everything ……doesn’t it? J


The next time we went for a nature walk, I took a bottle half filled with water. When we reached the tall grass and trees, I turned the bottle upside down and let the water gush out. As soon as the last drop ran out of the bottle, air rushed in, filling the vacuum. I immediately pushed in the cork. “Look,” I said, “we have captured the sounds and the smells of nature………forever.” Dianne was particularly excited. I stuck a label on the bottle:

June 8th 1966
This bottle holds the smells and sounds of the flowers
and the trees around our school.

And that started something. Every time things were really humming in the classroom, I filled a bottle with all of the energy, sound, wit and wisdom of my children, labeled it and displayed it on a shelf.

So, when your young scientist is engaged, capture the moment.

HOW? It’s easy. At a critical ‘Oooh, aaah’ moment, take off the top of a tiny bottle. Blow across the top. The fast-moving air sucks out the air inside the bottle. When you stop blowing, the air, and the atmosphere of excited learning, rushes in.

Think about what you’ve done!

You have captured the time and the moment, the joy of being a young scientist……forever!

 



[1] They should be. I have used them with scientists aged four years of age and up.