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December 24th, 2007

Don’t Miss Mars Tonight Near The Nearly Full Moon

moon in trees
last night’s full moon

Tonight Mars is the brightest it will be for the next nine years. Of course, it looks like a star instead of a planet. You should be able to see it in the twilight just before the sky goes totally black. It was the only star out there last night when I saw it up next to the moon in the eastern sky.

It will be up there again tonight, and it should be easy to find if you take the family out just after sunset with a mug of hot cider. But go out before it gets too dark and all the other stars come out. Planets reflecting the recently set sun are visible before stars start to shine. Being out there early will raise your chances of locating Mars easily.

Two articles that will help you locate Mars:

Full Cold Moon Nears Mars (last night)
Earth Between Mars and Sun (tonight)

Other Mars news: “Because of current uncertainties about the asteroid’s exact orbit, there is a 1-in-75 chance of [Asteroid] 2007 WD5 impacting Mars.”

December 18th, 2007

Death Star Black Hole Attacks Distant Galaxy with Death Rays According to NASA

I am stunned. It reads like a science fiction novel, but it is true. There is even photographic evidence.

… NASA’s telescopes show the supermassive black hole as it begins shooting jets of radiation into the heart of a distant galaxy.

With tens of millions of stars in the black hole’s path it is likely that many planets will have been caught up in the deadly blast.

No life on any planet could survive the attack, according to astronomers. (source)

This is difficult to fathom. Here’s another snippet that tells that new stars and new solar systems could be the result of such upheaval.

The offending galaxy probably began assaulting its companion about 1 million years ago, which is relatively recent on a cosmic time scale….

“We’ve seen jets do pretty weird things to their environments, but a head-on collision is really rare and generates a [large] amount of information about physics that we can understand and use,” Evans said. “For that galaxy to be looking right down … the barrel of the gun of that jet is incredibly rare, so this makes it a really exciting discovery.”

Turns out that the “death ray” may not be all bad news for the victimized galaxy, at least theoretically, as such a massive influx of energy and radiation could help form new stars and solar systems by compressing gases. (source)

The second article has more photos.

We’re reading Galileo’s Daughter, which so far is much more about Galileo and his discoveries and troubles than about his daughter, which I’m happy with if you care to know. But the title, so far, is a tad misleading but may not be so as we get farther into the book. So anyway, I can’t help wondering what Galileo might have thought of black hole that’s on the offensive and what he might have postulated and/or concluded.

You’ve heard of Tycho Brahe, right? He was the Danish astronomer that lost part of his nose in a duel or something. Okay, then, here’s a funny bit from Galileo’s Daughter about Brahe’s beliefs:

According to the Tychonic order, the five planets orbited the Sun, while the Sun — surrounded by Mercury, Venus, Mars, Jupiter, and Saturn — circled the stationary Earth.

Can you imagine? I can’t. Galileo dismissed this view of reality, btw. Seriously, I don’t know why Galileo’s Daughter isn’t on homeschooling reading lists. It has been a great read aloud for us so far and would be fine for about 6th grade and up.

November 8th, 2007

Living Science at Upper Levels

Sure living books are great for grade school, but should a homeschooler still be using real books (aka living books) at the high school level?

I really don’t see why not. That’s how I, as an adult, learn. Think about it. All adults who are done with their classroom education use real books to learn. Oh, sure, you might use a tutorial to learn PostgreSQL, but a tutorial isn’t a textbook. While some college classes require a textbook, many also require that real books be read or consulted. If I want to know how to garden, I don’t grab the first botany textbook that I can find; I buy a gardening book. Take a look at your local bookstore. Is it full of textbooks? No. That’s because learning is best done through the use of real books.

So why can’t high schoolers learn by using real books, too? Why should high school science education be different? I guess it probably shouldn’t.

However, how can someone like me make sure that my students are properly prepared for college-level science if they’ve not covered what’s in the high school science texts? Well, a high-school-science-teacher homeschooling parent can figure that out. But I can’t. It’s easier and faster to just do what’s in the science text than it is to re-invent the wheel. No pun intended.

So we only do one year of “real book” science in high school. We title the class “Science Survey.” I have no idea if that’s the best title for the class, but it’s good enough for us. If you know of a better name, let me know.

For that class, the student chooses from biographies of scientists or any non-fiction science book that we can find in the library. It has to contain a lot of science; it can’t be a story about the childhood years of Enrico Fermi. My daughter’s already chosen and read a few books. She read that one about Archimedes, I think it was. She read another about a teenage chemist who became a perfumer. She’s read a few others, but I can’t remember the titles. She’s got them written down in her school records, but that’s at her desk a ways away.

Right now we’re reading Galileo’s Daughter by Dava Sobel together as a read aloud. I’m enjoying how Sobel shows Galileo’s excitement about finding four “Jovian planets” and how that when he took a trip from Florence to Rome, he set up his telescope every night along the way. She also tells that when Galileo found two of Saturn’s moons that he sent an encoded note to Johannes Kepler in Prague. Kepler could not read the code, as intended by Galileo. But the code proved to the world that Galileo was the first person to find two moons of Saturn — or it proved it when Galileo released the meaning of the code. He was a little hesitant because he wanted to make sure of a few more things before he told the world, but yet he still wanted to get the credit for the discovery.

So far, it’s a good book and we’re enjoying ourselves reading it. It gives us an example of a real scientist at work and how he recorded his findings and why. Reading books like this makes science seem real to the regular person rather than something only done in labs by people with goggles on. I truly think I’m learning more by reading some of these books with my students than I did taking that required science class at the university. Science doesn’t have to be boring. There are all sorts of science topics out there to choose from when picking real books.

Anyway, if you want to see a list of the books my son read for his class, I’ve posted them over at Homeschool RAQ.

October 30th, 2007

The Comet Is Easy to See

I thought for sure that we would have a difficult time of it, but by following the instructions at Earth and Sky, we had no problems. The comet is named Holmes.

This is the part of the instructions that was key:

“Remember, all stars look like pinpoints. Comet Holmes is a fuzzball.”

We could see it easily with the naked eye. When I brought out the binoculars, it was a little more clear. Binoculars aren’t necessary though.

October 30th, 2007

Are You Missing the Comet?

We are missing it. And I am not amused.

It is supposed to be out in the evening, but I just am not getting out there. To top it off, I have not even managed to mentioned to either of my progeny — you know, because they might be able to remind me.

I think I am missing this evening comet because when 5 p.m. rolls around (when school ends here), I just turn off and don’t think about anything but getting dinner made and relaxing my brain a bit. My daughter and I did managed to make it outside to see the Perseids meteor shower last August. The streaks seemed especially long this year which made the show rather spectacular. We were up on the hood of the vehicle under a comforter to stay warm and avoid rattlesnakes. In the summer we have to wait until late (like midnight) because sundown is so late.

As usual, Earth & Sky does not fail to inform about the current Comet Holmes. It explains how to see it. According to the comments, people were still seeing it last night. So I suppose there is still hope. I also found this article, too, that seems to tell us that we can still see it tonight. However, the morning news just let me know that clouds are forecast. Drats.

Comet Holmes supposedly doesn’t have a tail. No tail? That’s puzzling. There are supposed to be two tails, right? I believe I learned that over 15 years ago with what I remember as being our very first unit study on astronomy. The kids made comets out of foil and cotton balls (tails) and threw them around the living room. Ah, great memories.

Some pics.

January 15th, 2007

Comet Sighting

UPDATE for NOVEMBER 2007: See EarthSky for directions to view current Comet Holmes.

Just an update to the other day’s comments about the comet …

We saw McNaught! It was so much better than Hale-Bopp, which we remember as a cotton-ball-type mass in the sky. McNaught had a really long tail, surprisingly, and it was rather vertical-looking. The comet and its tail were visible by the naked eye. It looked just like a comet should. Perfect.

I am so jealous of the Southern Hemisphere getting to see it for a few weeks.

Didn’t any other homeschoolers see it? I don’t see much talk about it among homeschoolers online.

UPDATE: No longer visible up north. See Wikipedia article.

January 12th, 2007

We Can’t See the Comet!

Since we can’t see McNaught, we’ve been watching it on YouTube.com here and here and here.