Stay up late for a great cosmic show: The first eclipse of April 2014 is tonight!

Don’t forget: there’s a lunar eclipse tonight! The eclipse will begin shortly before midnight and continue until 4:30 in the morning on April 15. You’ll be able to see the eclipse from just about everywhere in Houston, but especially well at the George Observatory, where you can watch through telescopes away from city lights.

We’ve been getting a lot of people asking, “What exactly is a lunar eclipse?” Well, a lunar eclipse is when the Moon passes into the Earth’s shadow, or umbra. For this to happen, the Sun, Earth, and Moon have to be perfectly aligned.

For those who have never seen an eclipse, it is quite breathtaking. The Moon will start out full. As it rises, it will reach the edge of the umbra shortly before midnight, where it will begin to disappear. As the Moon continues to rise, it will slowly be engulfed by the Earth’s shadow. Then, as it sets, the Moon will slowly reappear until it is full again (roughly around 4:30 in the morning).

Since this a total eclipse, it can be viewed anywhere in the world that is facing away from the Sun. You can sit outside, even in the city, and view the eclipse yourself.

However, the George Observatory will be open all night to the public tonight. For $5 per person, you can enjoy our three large telescopes. Then, once the eclipse begins, relax on our deck and watch the eclipse with our astronomers. Besides the Moon, Mars will also be visible (we’ve just passed opposition, so tonight’s a really a great chance to see the red planet, as it’s much brighter than usual).

Want to know more about the Moon while you gaze up at it tonight? This great video from Live Science goes through the history of the formation of the Moon and how it got some of its most famous features!

Huh? Nope, it’s Heh: How the Egyptians measured time and thought about eternity

The week is finally over! While only five days long, the workweek can certainly feel like an eternity. Which got me thinking (as many things do) about how the Egyptians measured time and thought about eternity.

Houston HehBarely an inch in height, this small hammered gold object depicts a man kneeling, wearing a knee-length pleated linen kilt and a long wig which comes down in two lappets on either side of his face – the typical get-up of Egyptian gods. His right hand stretches out to grasp a tall element with a curving top; his missing left hand originally did the same.

His pose and accessories identify him as the god Heh. Larger, more detailed representations show that the curved objects he holds are palm ribs, notched to tally up the years. The ‘years’ often rest on crouching frogs or tadpoles, the hieroglyphic sign for ‘100,000;’ these in turn sit on top of tied rings, symbolizing enduring protection.

Big HehWith all this in mind, it’s no surprise that Heh was considered the god of eternity, and was himself used as the hieroglyphic sign for ‘1,000,000’ – the largest number the Egyptians wished to write. Images of Heh in temples and on royal objects provided an eternal framework for the rituals that surrounded them. Tutankhamun was buried with a mirror in a Heh-shaped case, keeping him forever safe and youthful.

Our Heh is smaller and less finely worked than these, but is still made from expensive gold and would have been a cherished possession of its owner. A loop soldered to his back allowed him to be attached to a cord, where he would have served as an amuletic charm on a necklace, or possibly an element of a diadem.

Excavated parallels to our Heh date to the late Old Kingdom and First Intermediate Period (which we Egyptologists abbreviate to ‘FIP’) of Egyptian history (Dynasties 6-10, around 2300-2000 BC), and illuminate the problems we can run into when studying the past. Literary accounts of the First Intermediate Period describe it as a period in which the legitimate king was unable to exercise his authority: chaos, fighting, and famine ensued until the kings of the Middle Kingdom were able to reunite the country.

Excavations of FIP cemeteries, however, reveal a different picture. Valuable metal objects like weapons and our Heh are preserved in far higher quantities from FIP graves than Old Kingdom graves. If the FIP didn’t benefit the king and his court, less privileged people used the weakening of royal control as an opportunity to enrich themselves in this life and the next.

The amulet of Heh will go on display in the Hall of Ancient Egypt in the summer. Keep an eye out for him!

Who is Yuri and why are we celebrating Yuri’s Night at Mixers & Elixirs?

Yuri’s Night is upon us, and we’re hosting Mixers & Elixirs: Yuri’s Night on Friday night to celebrate the past, present and future of space exploration.

But wait a second. Who’s Yuri and what’s he got to do with space exploration?

Yuri Gagarin was the first person to be launched into space and orbit the Earth on April 12, 1961. The Russian cosmonaut has since become a symbol of human space exploration and how we can conquer the obstacles that stand between us and the rest of the cosmos. Trapped on our little blue marble in space, for eons we sought to find the truth behind our place in the universe. Now, with technology and an ever-growing catalog of information about the universe, we are starting to venture into our cosmic neighborhood.

Just think of all that’s happened in a little over 50 years — and what 50 more years could bring. We’re peering deeper into space, living in space, and it won’t be long before we (read: everyday people like you and me) can see the darkness of space for ourselves on private space flights.

Yup, there’s certainly a lot to celebrate on Yuri’s Night. So join us tomorrow night and raise a glass to space exploration and explorers everywhere! We’ll have space-themed treats and even “Commander Quest” from Space Center Houston.

Want to get even more excited and inspired? (Of course you do.) Check out the video below from astronaut Chris Hadfield aboard the International Space Station and pictures from cosmic journeys and observations so far!

The Hubble Telescope

Every light in this image from the Hubble Telescope is an entire galaxy.

The Sombrero Galaxy.

The Voyager Spacecraft, which has now traveled into interstellar space — the furthest a spacecraft has ever gone.

Detail of Jupiter from Voyager.

Saturn, as seen from Voyager.

 

The ‘blood moon’ in Houston: Stay up late at the George for a stunning celestial show

A total eclipse of the Moon will occur very early Tuesday morning, April 15. Houstonians will be able to see the whole event, which begins just before 1 a.m. You’ll be able to see the evening’s cosmic events unfold even under city lights, but if you’d like a more detailed (and dare I say captivating) look at the eclipse, the George Observatory will be open all night long!

Lunar eclipses occur when the full Moon moves into the Earth’s shadow. The first part of the Earth’s shadow that the Moon will encounter is the penumbra. The penumbral shadow’s faintness means that sharp-eyed observers will notice only a slight dimming of the Moon between 11:55 p.m. on Monday night and 12:58 a.m. Tuesday. The Moon moves into the darkest part of the earth’s shadow, the umbra, at 12:58 a.m., and will be totally eclipsed by 2:06 a.m.

The Moon’s brightness during a total eclipse depends on the amount of dust particles in the atmosphere. A large amount of dust from a volcanic eruption, for example, can make the totally eclipsed Moon almost invisible.

With little dust in our atmosphere, the Moon glows reddish-orange during totality.

This is because only the Sun’s red light comes through the Earth’s atmosphere and falls on the Moon even while it is in the Earth’s shadow. As the diagram shows, the Moon will pass through the southern part of the shadow, for about 78 minutes of totality. As a result, the northern limb, closer to the center of Earth’s shadow, will appear darker.

We’ll see our next total lunar eclipse in Houston just before dawn on October 8, 2014 (the second of four occurring between 2014 and 2015!).

For more on how lunar eclipses work, watch the video below from NASA and USA Today.