Showing posts with label astronomy. Show all posts
Showing posts with label astronomy. Show all posts

Saturday, July 16, 2011

The Space Shuttle: End of an Era

Ever since I was a young child, I have been completely captivated by and utterly fascinated with outer space. My earliest career ambition was to be an astronaut. I actually still possess my journal from kindergarten, which contains a page where my teacher had us write about and draw what we wanted to be when we grew up, and I drew myself (rather poorly, unfortunately, as I lack any artistic skills whatsoever) jumping around on the Moon in a green and silver spacesuit. I absolutely loved watching the Space Shuttle launches on TV.  When I was around 8 or 9, I even attempted to convince my parents to take our summer vacation in Florida so that we could visit Cape Canaveral and attend a shuttle launch . Although I was unsuccessful, probably because I was the lone member of my family truly interested in manned space flights, I continued to dream of eventually being one of the astronauts blasting off on a magnificent Space Shuttle.

Regrettably, it just wasn't meant to be. By the age of 11, I realized that my aspiration to become an astronaut was wholly unrealistic. First, I had moderate asthma which was not well controlled by my medications at the time. Second, I was rapidly approaching legal blindness in my left eye due to severe amblyopia (lazy eye), which has left me with almost no depth perception and an enormous tendency towards clumsiness. I was just not good astronaut material.

Despite being extremely disappointed, I was still mesmerized by the perplexing wonders of the universe. One day in sixth grade, we took a class trip to the school library. I quickly dashed to the non-fiction science section as always because, even at the tender age of 11, I was a hardcore science nerd. Having been at this elementary school for four years, I had already read practically every single book in that section, so I instantly noticed that there were several new books.  Excitedly, I seized one which appeared especially intriguing and deposited myself into one of the comfy, upholstered chairs.

The book was about the Hubble Space Telescope. I cracked open the book and began to flip through the pages, looking at the amazing images the telescope had captured of our universe. However, when I reached the now-famous image of the Pillars of Creation in the Eagle Nebula, my breath was literally taken away. I stared in pure awe at its extraordinary beauty. Before we left that day, I checked out all the library's books on nebulae, as I was fiercely desperate to learn everything I could about these astonishing and majestic phenomena.

Only a couple months later, I was enjoying my final night at a week-long Girl Scout camp in western Oklahoma. One cool tradition was that, weather permitting, we would spend our last night at camp on the tennis courts, instead of in our cabins. Once all the girls were settled in their sleeping bags, the camp counselors showed us constellations, asterisms, planets, star clusters, the Andromeda Galaxy, and the edge-on band of our own galaxy, the Milky Way.  They wielded green laser pointers, in order to indicate and/or trace out the different celestial objects for us, and passed around pairs of night vision binoculars, so that we could better observe the compact objects, like the planets, the star clusters, and the Andromeda galaxy.

The incontrovertible highlight of the night, though, was that a minor meteor shower was taking place. Over the span of 3 hours, I got to see about 20 meteors (although we called them shooting stars at the time). Even better, this was the first time in my life I had ever I had ever witnessed meteors. It was absolutely spectacular.

Those two events are what sparked my interest in astronomy and inspired me to dedicate my life to it, in order that I might unravel some of the countless mysteries of the universe.

However, despite exchanging my dream of being an astronaut for my desire to be an astronomer, I have maintained a profound enthusiasm for the Space Shuttle Program and eagerly followed each mission since I was 12, celebrating triumphs and grieving for loss.

In my opinion, the Space Shuttle's most outstanding accomplishment is the still continuing construction of the International Space Station.  Throughout my Jr. High, High School, and College years, I have watched intently as the astronauts, whom I tremendously admire, have gradually erected the International Space Station, a monument both to human scientific achievement and international cooperation.

Of course, I was immensely devastated by the Columbia disaster in 2003. I distinctly remember watching the news, thinking "how could this have happened?" and softly crying for hours as more and more details trickled into newsrooms across the country. NASA, however, was able to come back from this tragedy and continue to advance the frontier in space and manned space flight.

Last Friday was the very last launch of Atlantis, the very last launch of any of the Space Shuttles. I woke up early in order to watch Atlantis propelled into orbit on a colossal cascade of roaring flames. Knowing I will never see another Space Shuttle launch, I could not stop myself from shedding a few tears.

This coming Thursday Atlantis will return to Earth from its final mission and land, most likely at the Kennedy Space Center in Cape Canaveral, Florida, or else at Edwards Air Force Base in southern California, finally bringing about the end of a glorious era, which has not only significantly influenced my own life, but also the lives of millions of American's. I know chances are good that I will cry even more as the Space Shuttle program I have followed for ten years finally reaches its completion.

So, I must now say my final goodbye to Discovery, Endeavour, and Atlantis. Thank you for all your incredible contributions to science, as well as all your totally awesome launches (especially the ones at night!)! You will be sorely missed.

Saturday, March 19, 2011

Saturday Night: Full Moon Coincides with Perigee

Tonight's full moon is rather special. First, the moon will be full, which is always an amazing and beautiful sight. Second, the moon will be at perigee. Perigee is the point in the the moon's monthly orbital period where it is closest to the Earth. Conversely, apogee is the point in the moon's monthly orbital period where it is farthest from Earth. This month's perigee will be the closest approach towards the Earth the moon has made in 18 years. This fact, along with the moon illusion, means that if you catch the moon near moonrise or moonset, you are in for a spectacular view, and I strongly encourage everyone go outside and gaze at the moon tonight, even if only for a quick glimpse. Here is a calculator to find the moonrise and/or moonset times at your location.

Learn what makes a big full moon a true 'supermoon' in this SPACE.com infographic.
Source SPACE.com: All about our solar system, outer space and exploration

However, I cannot say I am thrilled about the media dubbing tonight's event a "supermoon". While this combination of events is relatively rare, calling it a "supermoon" helps inflame rumors and panic that this full moon will generate natural disasters, such as huge earthquakes or volcanic eruptions. It will result in a larger range in the tides (i.e., high tide will be higher than normal and low tide will be lower than normal) over the next two or three days, called a perigean spring tide, which could possibly cause minor coastal flooding.

However, as an astronomer, I am thrilled anytime the general public is interested in astronomical phenomena. In the modern world, I think we sometimes take for granted the incredible celestial bodies which light up our night sky. Personally, I am greatly anticipating observing the full moon with my telescope tonight.

Monday, February 28, 2011

Sun Unleashes Massive Solar Flare

Last Thursday, the Sun discharged an immense solar flare, thankfully pointed away from the Earth. Since we are approaching the maximum in the solar cycle, the Sun is becoming more active. Solar flares and events known as Coronal Mass Ejections (CME), will become relatively common over the next year or two. A CME is where basically the Sun suddenly ejects a ton of material  out into space, as opposed to a solar flare, where most of the ejected material falls back onto the Sun.

This solar flare is nowhere near the most powerful one ever recorded. Actually, there was a flare on Valentine's Day that was almost ten times as powerful. That one was directed towards the Earth and it did cause a few problems. However, what is great about Thursday's flare is the awesome video the Solar Dynamic Observatory captured!



Solar flares and CMEs send a stream of charged particles towards Earth, which enter our atmosphere. The Earth's magnetic field forces the charged particles to flow towards either the North or South Pole, which causes the aurora borealis and the aurora australis (the northern and southern lights). Unfortunately, if enough particles make it to Earth, it can also generate electrical interference, called a geomagnetic storm. Satellites can be damaged and entire power-grids overloaded. In 1989, most of Quebec, Canada lost power due to a geomagnetic storm. In our modern world, where we rely on electronic devices for almost everything, including communication and navigation, this could be devastating if it occurred on a larger scale.

There's your science lesson for the day!

Monday, September 13, 2010

Jupiter Bright in the Sky

For anyone interested in astronomy, Jupiter will be extremely bright throughout the month of September. Actually, it is at the brightest magnitude that can be seen from Earth. It rises in the east around sunset, so best viewing would be a couple hours later. Brighter than any other star, it is easily visible to the naked eye. Even a small telescope will have enough power to show you Jupiter's reddish-orange equatorial bands and it's four largest moons (Europa, Callisto, Ganymede, and Io) as small points of light close to the planet.

*Note: To tell the difference between a planet and a star, look closely at the light. Starlight twinkles, but the light from a planet does not.