# Earth rise?

I made this image using a blow up globe and a bath towel..

Trying to replicate the globe rising over the limb of the moon. But obviously our world doesn’t have latitude or longitude printed on it! And we don’t have different countries coloured in to indicate where there bordered are. I wonder how flat earth believers react to the real image. Do they think the other half of the world is on the back? If it was flat the sun wouldn’t rise slowly but it would illuminate half of the world straight away (unless you are behind a mountain) then after twelve hours set immediately. One side of the world would be in daytime at the same time, the other night time. Get rid of most time zones! Only two needed, twelve hours separating them. Plus you’d notice crossing the edge! And no seasons, so no equatorial heat or Arctic and antarctic regions! And where does the edge fall and wouldn’t the international space station notice?

Thinking… Its good to try it out!

# Parallax

The photo is an illustration and it doesn’t actually show parallax.

Do you know what parallax is?

Hold out your thumb in front of you and close one eye. Place it so that it covers something, perhaps a flower outside, or something in front of you. Maybe the moon.

Now without moving your hand open your eye and close the other one.

What do you see? The moon or the object appears to have moved! That is because your eyes are seperate. They are the base of a very long thin triangle and believe it or not you can measure distance that way.

Now stick a piece of wood in the soil on the equator, and a similar one a few miles north or south of it. At midday on the equator the sun will be directly overhead and there will be no, or hardly any shadow. But the one miles away will cast a shadow. The further away from the equator the longer the shadow. If you know the distance between the sticks, and the angle the shadow casts by the other stick. (measure the angle from the top of the stick and the end of the shadow) you can actually work out the distance to the Sun (which is casting the shadow). In this way the ancient Greeks did this and also worked out the size of the Earth approximately. You can use this idea if you look at a star at one end of the Earth’s orbit and six months later the other side of the orbit. That’s how they work out distances to stars. Amazing what you can work out by using your eyes, a couple of sticks and your thumb!

# Starry

I’ve been making patterns again, this time using a close up of sequins on my jumper… Very random I know.

The stichesĀ  on the jumper also add texture to the photo. IĀ think the stars look like little dancing people holding hands.

I love stars and astronomy. I’m interested in things like the magnitude of stars, seeing comets, planets and asteroids. I read web pages like spaceweather.com which gives you information about CMEs (coronal mass ejections) from the Sun, which is caused by the sun’s magnetic lines of force getting tangled up and hurling out plasma from the sun’s surface.

If the weather is clear I will look out for meteor showers like the orionids or geminids (Based on the constellations they appear to emanate from).

I wish I lived in the southern hemisphere. I have heard of the magellanic clouds (small neighbouring satellite galaxies) which are below the plain of the ecliptic, which is the flat plain of our galaxy. Anything below that can only be seen from the south.

We (our planet) is topped at an angle of 22?degrees. So although we see constellations they vary with the seasons. They rise above the equator or sink below it depending on where we are in the year. If you sailed on a boat or flew on a plane at night you would see the constellations change as you flew north to South, or vice versa. Some constellations like the southern cross are only visible in the southern hemisphere and some like the plough or Great bear are only visible in the North.

I had a couple of little telescopes and once saw a tiny image of saturn and its rings and the galilean satellites of Jupiter – four moons that orbit Jupiter. There are more but are too small to see in a backyard telescope.

I’m no expert but I do like to learn. I’m sure there are lots of websites where you can find more information. Funny how I can ramble on after describing my jumper!

X

# Sunset

The night draws in again

Sunset and its rosy glow is gone

Eight minutes before the sun set

Light travelling ultra fast,

Eight minutes to shine from sun to earth.

Energy in motion, then lost

Behind the hill

Night infects the light

It’s inky blackness sometimes reduced

By moon and stars

Or reflected light on clouds.

But the dark cannot hold as the earth turns.

Tipped slightly, seasons prevail North and south.

As spring arrives days grow longer

Now sunsets late or never

While equator stays the same

the North and South vary.

Sunset later every day till mid summer

Then decline.