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BellaOnline's Astronomy Editor

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Earth & Moon

Articles about our home - and our close companion, object of awe, subject of poetry and the only other world on which humans have walked.

Absolute Beginners - Moonwatching star
We take the Moon for granted, because itīs so close to us and easy to see. But itīs a beautiful and interesting object as it goes through its monthly changes. If you use a pair of binoculars, you can learn to recognize many of its main features. Some of them are visible without binoculars too.

Autumnal Equinox star
Autumn begins on the equinox as the Sun crosses the equator. Equinoxes were celebrated by the earliest known civilizations and still are in many places. One of the biggest celebrations these days is the Chinese Moon Festival. A traditional palace or garden probably has a moon-watching pavilion.

Cancer the Crab star
Cancer the crab scuttles across the late winter sky, well away from its nemesis Hercules. Cancer is a zodiac constellation, the Tropic of Cancer is named for it, and it has existed for over three thousand years. Yet it seems to be a dim and unremarkable constellation. Why all the attention?

Carrying the Fire - book review star
What was it like to be one-third of the Apollo 11 crew? Michael Collins, the man in the command module that didnīt land on the Moon, tells a fascinating story of astronaut training and space travel. Originally published in 1974, a Fortieth Anniversary edition of Carrying the Fire was issued.

Christmas in the Skies star
Christmas is a special day with a magic of its own. A Christmas eclipse is a great treat and centuries ago a long-awaited comet finally showed up on Christmas day. On the other hand, imagine spending the holidays a quarter of a million miles from home as the crew of Apollo 8 did.

Cosmic Collisions star
We no longer see the heavens as perfect and the stars as eternal and unchanging. Even the Universe had a beginning, and everything that we observe changes and evolves. Many of these changes involve cosmic collisions.

Ecliptic and Equinoxes star
The objects in the night sky seem to be projected onto the celestial sphere. A coordinate system lets us say where everything is, but something's not quite right. The north polar star will be Vega one day. Astrological star signs don't match the constellations any more. What's going on?

Exploring the Apollo Landing Sites star
NASA sent the Lunar Reconnaisance Orbiter (LRO) to the Moon to spy out sites for future manned missions. It doesnīt look like theyīll be sending anybody to the Moon, but LRO has documented the Apollo landing sites. Astronomy writer and space expert Ian Ridpath takes us to the Moon for a look.

Galactic Winter Games star
Welcome to the Galactic Winter Games, a starry tribute to Earthīs Winter Olympic Games. Itīs a tour of some really cool cosmic sights – as well as some hot ones, such as one of the biggest explosions in the Universe.

In the Shadow of the Moon Review star
What would it be like to leave Earthīs protective embrace and journey to an alien world? Only twenty-four men have ever experienced this - Apollo astronauts. "In the Shadow of the Moon" uses original footage & astronaut interviews to tell the story of one of the defining events of human history.

Itīs Alive - book review star
Bang Theory in verse and drawings. Now stars and planets have formed, but something new is happening: Life. Book 2 is about evolution by natural selection. In its cheerful verse and lovely color drawings, itīs also a love poem to our beautiful Earth.

Lunar Eclipses star
Imagine the horror: Something is eating the Moon, leaving its face covered in blood. This was how people once viewed lunar eclipses. Find out what actually causes a lunar eclipse, why the Moon may turn red during an eclipse, and where a lunar eclipse becomes a solar eclipse.

Moon Facts for Kids star
The Moon has no air, no sound, no weather and no liquid water. But you could see the Earth in the sky, shining more brightly than the Moon does from Earth. And since gravity is weaker, you could jump quite high and the footprint you left might last a million years.

Once in a Blue Moon star
"Once in a blue moon" is a common English expression and it refers to a rare event. But why a blue Moon? And what is a blue Moon if it isn't blue? There is no unique answer, but here are a few things it could be.

Solar Eclipses star
Is it an ill omen, an amazing or terrifying experience, or a great opportunity for scientists? Solar eclipses have been all of these things and more. Read on to find out what it's all about.

Summer Solstice - St Johnīs Day star
Each day for six months after the winter solstice, the Sun rises a bit higher in the sky. It reaches the maximum height at the summer solstice, the longest day. Evidence of rituals and festivals at the times of the solstices goes back thousands of years.

Teaching Moon Phases and Eclipses star
Why does the Moon seem to change shape? If eclipses happen when the Sun, Moon and Earth are all lined up, why donīt they happen every month? If youīre an educator, you may need to understand why and explain it to children. Here are some online resources to help you out.

The Moon - Earth's Daughter star
The Moon preserves the history of the early Solar System that weathering has swept from Earth's surface. It lights up our nights and is the ancient timekeeper of human prehistory. A massive collision may have created the Moon from the body of the Earth.

The Sun the Moon the Calendar star
If you look at your calendar to find today's date, you can see the month, days of the week and maybe some appointments. But you're also looking at something that tracks Earth's journey around the Sun, reflects three thousand years of history and helps hold our society together.

Top Astronomy Stories 2012 star
What were the big astronomy stories of the year 2012? Here is my choice of the top ten plus a non-story. What do you think?

Top Ten Astronomy Stories of 2013 star
What were the big astronomy events of 2013? Here are my top ten choices and they include a big bang over Russia, a Moon goddess and Jade Rabbit, a telescope in the high Andean desert to look for the first galaxies and the launch one of the most ambitious space missions ever.

Vernal Equinox star
Youīve made it through the winter and watched the food stores diminish. But the days are getting longer and green shoots are appearing. Spring is on the way. The festivals of the vernal equinox emphasize rebirth and renewal. In many cultures the equinox is also the New Year.

Water on the Moon star
Everybody had known for a long time that the Moon was bone dry. In the nineties probes found some evidence of water. After a big announcement of water on the Moon, it went back again to being described as dry. What's the story in the 21st century?

What Is a Supermoon star
Some times the media are full of stories about a supermoon. They may even include dire predictions of earthquakes, tsunamis and other disasters. What is a supermoon and should you be worried?

Winter Solstice star
For six months, each day has been shorter than the last, the Sun lower in the sky. Will it disappear altogether and leave the people bereft in the dark cold winter? The winter solstice is the shortest day of the year and is associated with more festivals than any other astronomical event.

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