Know your Moon

The Moon has a prominent place in myth and folklore throughout human history.

Formation
According to a theory, the Moon was created when a rock the size of Mars slammed into Earth, short ly after the solar system began forming about 4.5 billion years ago.

Locked in orbit
Perhaps the coolest thing about the Moon is that it always shows us the same face. Since both the Earth and Moon are rotating and orbiting, how can this be? Long ago, the Earth's gravitational effects slowed the Moon's rotation about its axis. Once the rotation slowed enough to match its orbital period (the time it takes to go around Earth), the effect stabilised. Many of the moons around other planets behave similarly.

What about phases?
Here's how they work: As the Moon orbits, it spends part of its time between us and the Sun, and the lighted half faces away from us. This is called a new Moon.Once it is opposite the Sun, it becomes fully lit from our view - a full Moon.

Moon trees
More than 400 trees on Earth came from the Moon. They came from lunar orbit. In 1971, Apollo 14 astronaut Stuart Roosa took a bunch of seeds with him. Later, the seeds were germinated on Earth, planted at various sites around the US, and came to be called the Moon trees. Most of them are doing just fine. read more......

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Strange things in space

Antimatter
Like Superman's alter-ego, Bizzaro, the particles making up normal matter also have their opposite versions. An electron has a negative charge, for example, but its anti-matter equivalent, the positron, is positive. Matter and anti-matter annihilate each other when they collide and their mass is converted into pure energy.

Mini black holes
If a radical new “braneworld” theory of gravity is correct, then scattered throughout our solar system are thousands of tiny black holes, each about the size of an atomic nucleus. Unlike their larger brethren, these mini-black holes are primordial leftovers from the Big Bang and affect space-time differently because of their close association with a fifth dimension.

Microwave background
Cosmic microwave background — also known as the CMB — this radiation is a primordial leftover from the Big Bang that birthed the universe. It was first detected during the 1960s as a radio noise that seemed to emanate from everywhere in space. The CMB is regarded as one of the best pieces of evidence for the theoretical Big Bang. Recent precise measurements by the WMAP project place the CMB temperature at -455 degrees Fahrenheit (-270 Celsius). read more........

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