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Skyward: March 2019

By David Levy  |  10 Mar 2019

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This entry is part 25 of 36 in the series Skyward by David Levy

For the Love of Comets

If you have read this column more than once, you probably are not too surprised to understand that I love comets. Comets are a part of me, a part of who I am.

But I had to wait a while before I saw my first comet. I was already 17 years old and had been interested in the sky for a number of years. When I learned that the two young Japanese amateur astronomers Kaoru Ikeya and Tsutomu Seki had discovered a comet that could become the comet of the century, I was spellbound. During the mild autumn of 1965, as I awaited this mighty comet, I decided to begin a comet search program of my own.

Comet Ikeya-Seki Comet C/1965 S1 (Ikeya-Seki), 30 October 1965. Photo by James W. Young (TMO/JPL/NASA)

At the end of October I finally saw this comet as it rose, tail first, in the sky to the east beyond the St. Lawrence River. I observed it again a week later in early November. I have never forgotten it, even as, in later years, I finally was able to correspond with the comet’s two discoverers. Their comet did become the brightest comet of the 20th century, and my own program, after many more years of searching, was successful.

To me, comets are as personal as almost anything in my life. I have discovered or co-discovered 23 of them, but my favorite is Comet Hyakutake. (prounounced Yah-koo-tah-key.) This comet provided everything a great comet should: it was big, it was bright, and its tail stretched majestically across the sky. I followed the tail one night from Polaris, the north star, all the way past Corvus in the far southern sky. When I reported my observation, a professional astronomer wrote to me that it was simply impossible for the tail to be so long. In order for that to happen, the tail would have had to stretch from Earth past Jupiter. A few years later, scientists studying the data from the Ulysses space probe identified its detection of the tail at the orbit of Jupiter, and the astronomer confirmed what I saw.

Comet C/1996 B2 (Hyakutake) Comet C/1996 B2 (Hyakutake), taken on 1996 March 25. Credit: E. Kolmhofer, H. Raab; Johannes-Kepler-Observatory, Linz, Austria (http://www.sternwarte.at)

There is one other aspect that I can write about Comet Hyakutake. Between the time it passed so close to the Earth and the time it passed close to the Sun a couple of months later, Wendee and I were growing closer. One evening as we were driving home to Arizona from Las Cruces, New Mexico, I pulled over, turned off the car, and we enjoyed the comet together as it was ner its perihelion, or its cloest point to the Sun. It was the first time Wendee saw a comet. She saw another one, Hale-Bopp, the next year on our wedding night. And on October 3, 2006, she saw a third comet, one I had discovered the previous morning.

Comet C/1995 O1 (Hale-Bopp) Comet C/1995 O1 (Hale-Bopp), taken on 1997 April 04. Credit: E. Kolmhofer, H. Raab; Johannes-Kepler-Observatory, Linz, Austria (http://www.sternwarte.at)

Oh, how I wish that more young people could capture the love of the night sky. Maybe soon another bright comet will pay us a visit, and a young teenage girl or boy will look up, watch it wander lazily across the sky, its tail pointing off in some direction, and maybe this comet might inspire that young person to learn about the night sky that is so much a part of us.

Halley's comet Halley’s comet, taken with the 61-inch telescope at Mount Bigelow, near Tucson, Arizona. The image clearly shows a bright tailward jet of dust emanating from the nucleus. Credit: Steve Larson and David Levy.

From the editor:
In recent weeks, images and animations of comet C/2018 Y1 (Iwamoto) have been seen on social media:

Comet C / 2018 Y1 Iwamoto over Austria on February 7, 2019. Picture by Michael Jäger #Comet #Space pic.twitter.com/Dg3dmbR7sD

— Strange Sounds (@Strange_Sounds) February 10, 2019

NASA has a beautiful set of solar system posters, including one on comets:

NASA Comet Poster NASA Comet Poster, showing comet 67P/Churyumov-Gerasimenko based on two images acquired by the European Space Agency’s Rosetta mission. Credit: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA
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More Posts in this Series:
"Skyward by David Levy"

78  |  What Do We Lose When We Sacrifice Science?

By Br. Guy Consolmagno  |  27 May 2021  |  Sacred Space Astronomy

69  |  To err is human… to admit it, is science

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24  |  Skyward: February 2019

By David Levy  |  6 Feb 2019

26  |  Skyward by David Levy: April 2020

By David Levy  |  10 Apr 2020

27  |  Skyward by David Levy: May 2020

By David Levy  |  11 May 2020

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