Moon Passages

The waning and waxing Moon create beautiful close encounters with the planets in the coming days. In the pre-dawn skies the ever-thinning waning crescent passes near to Mercury, Jupiter and Mars, and a few days later after the new moon, the waxing crescent passes close to the brilliant evening "star" Venus.

Comet Lulin

A comet is making its way across the Solar System and is reaching its best viewing in the next few days. Comet Lulin was discovered in 2007 and is now reaching its peak brightness as it moves into "opposition" on February 25th, the date it is exactly opposite the Sun from our Earth-bound point of view. On that date it will be visible in the evening sky near Saturn in the constellation Leo. Sky and Telescope Magazine has a great writeup on the comet.

KFOG Broadcast: January 27th, 2009

Quick Guide to locate the Orion Nebula

Face south in the early to mid-evening and Orion is high in the southern sky. It is easy to identify because of the distinctive "belt" stars and the bright shoulders and kneecaps of Orion. Below the belt hangs the sheath of the sword of Orion, and in the middle of what appears to be three stars is the Orion Nebula. Through binoculars or a small telescope you can clearly see glowing gas and clouds with a distinctive blue hue.

Brilliant Venus

Venus is a remarkable object in the evening sky. It has been steadily brightening throughout January and will continue through February as it climbs high in the evening sky. Winter skies in San Francisco can yield some of the best viewing. I went out for a look at the western sky at Ocean Beach tonight and although it was cold and breezy, the week ahead is forecast to bring sunny days and crisp, clear nights. With Venus approaching its maximum brightness it is shimmering in the west, dominating the sky and making all other celestial objects pale by comparison. That is, until the Moon shows up!

This week brings the monthly dance of planets and Moon. Find a good western horizon to enjoy the monthly spectacle of the young crescent Moon climbing higher each night. The Moon takes just over 29 days to orbit the earth so from one day to the next it moves approximately 12 degrees against the backdrop of stars. Each evening you can see the change in the Moon's position and Venus serves as a helpful reference point in the sky especially from Thursday 29th to Friday 30th. Dress warmly and enjoy!

Waning moon meets red giant before dawn

Many of the brightest stars in the sky are located on or very near to the Ecliptic, the path across the sky that the Sun, Moon and planets follow. The Ecliptic crosses over all 12 of the Zodiac constellations as well as pieces of other constellations. Every 29 days as the Moon wanders on its journey around the Earth, we see it crossing through all 12 Zodiac constellations, often with close encounters with the stars in these constellations.

On January 21st, the Moon will cross very near to the bright red star Antares in the constellation Scorpius. Antares is in fact a red supergiant star, thousands of times larger than our Sun but considerably cooler, hence the red color of the light emitted from it. For those in South America, the Moon will appear to pass directly over ("occult") Antares but for us here in San Francisco we will see the Moon and Antares several hours later when they are going to be very near each other but not overlapping.

All of this is visible in the final minutes of the night just before the first light of dawn, but given good weather conditions lately in San Francisco, it should be very visible and quite striking indeed. The view in the above illustration is what you will see from 5:30 to about 6:30 AM, before the light of dawn begins to brighten the sky.

George Ellery Hale and the world's biggest telescopes

I never tire of sitting in a domed room experiencing something to do with the universe, and when on the road I try to check out the local planetarium if time permits. While in New York City on business this week, I gave myself a night off and took in a show at the Hayden Planetarium. I was drawn in by a special showing of the PBS documentary The Journey to Palomar with an introduction and discussion by the film's two producers, Todd Mason and Robin Mason.

Growing up in Southern California I had a keen awareness of big telescopes in the region, including the 60-inch and 100-inch reflectors at the Mount Wilson Observatory (a little more than 10 miles line of sight from my home near South Pasadena), and of course the biggest telescope in the world at that time, the 200-inch Hale Telescope at the Mount Palomar Observatory. One time I convinced a couple friends to drive out and camp at Mount Palomar. We visited the observatory during the day and saw the big telescope from the visitors gallery - an impressive sight indeed.

Watching the documentary movie, I was very moved by the story of George Ellery Hale. It is accurate to say that he can be credited with single-handedly driving the creation of the biggest scientific instruments for astronomical research in the first half of the 20th century. He was a man of passion, vision and drive who used his boundless energy to gather the funding needed to build telescopes that had never been built before. Why did he do this? He was in a quest to see more, learn more, and uncover truths about our universe. He took the time to ask hard questions and then set out to create the scientific instruments necessary to get the answers he needed. By creating such amazing places to study the universe, he set the stage for astronomers such as Edwin Hubble to use these extraordinary telescopes to discover that the Milky Way was just one of many billions of galaxies. New theories were tested and validated by the images being gathered. The entire world of astrophysics was turned on its head.

The film producers pointed out that for those of us who grew up during the space race and the moon landings, these events overshadowed the profound discoveries using Hale's big telescopes and in time his notoriety was diminished. But if you take the time to learn about his life and the drive he had to better our understanding of our universe, you will see a story that has relevance for anyone interested in science. He showed that great advances in our understanding of all things comes from inspiration and commitment to an idea. I am motivated to carry on with my work as an amateur astronomer this year, the International Year of Astronomy, so others may be moved to look up and get inspired by what they see in the sky.

I'll be celebrating the International Year of Astronomy in 2009

400 years ago Galileo crafted a telescope and pointed it up at the sky. He might not have been the first person ever to do this, but he was the first to document his findings. By using visual evidence, he was able to shake up the truths of the world as it was known and understood in the early 17th century.

Now in 2009 it is time for us to celebrate his great work by turning our attention skyward and connecting ourselves with the sky - perhaps with a telescope, with binoculars, or just looking up with the unaided eye and taking it all in. Whether we uncover great new science or just learn the names of a few stars, The International Year of Astronomy (IYA) is already underway. Here is the purpose statement on the IYA website.

The International Year of Astronomy 2009 is a global effort initiated by the International Astronomical Union and UNESCO to help the citizens of the world rediscover their place in the Universe through the day- and night-time sky, and thereby engage a personal sense of wonder and discovery.

As an amateur astronomer, I am very excited about the potential of such an effort. To that end, I am adding a second new years resolution to my list, and that is to get out with my telescope and show off the sky to anyone who will care to stop by and look and talk. I have always found "sidewalk astronomers" to be good people, committed to raising awareness of the planets and moon and sun and ultimately, of science.

A highlight of the IYA will be "100 Hours of Astronomy" in April. From the IYA website: This is a 100-hour, round-the-clock, round-the-globe event that includes live webcasts from research observatories, public observing events and other activities around the world. I will certainly plan to do some public work such as sidewalk astronomy. I expect there will be local, national and international events as the date draws nearer. I'll post to the blog as I hear about interesting events.