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Dennis L. Mammana (born September 5, 1951) is an astronomy writer, lecturer, and sky photographer. [1] [2] His newspaper column about astronomy, "Stargazers", has been syndicated since 1992, and he has led many expeditions across six continents on photography and public eclipse and aurora viewing trips. [3]
Mammana was born in Easton, Pennsylvania. He graduated from Easton Area High School in Easton in 1969, and then studied physics and astronomy at Otterbein College in Westerville, Ohio, where he received his B.A. in 1973. After completing work toward his M.S. in astronomy at Vanderbilt University in Nashville, Tennessee, he was awarded a one-year internship at the Strasenburgh Planetarium in Rochester, New York.
Mammana has held positions at the Smithsonian Institution's National Air and Space Museum in Washington, D.C., the Flandrau Science Center and Planetarium at the University of Arizona in Tucson, Arizona, and the Reuben H. Fleet Science Center in San Diego, California. [4]
Mammana has authored six astronomy books for adults and children, and hundreds of magazine, encyclopedia, and web articles. [5]
He currently resides in Borrego Springs, California.
Catalina Sky Survey is an astronomical survey to discover comets and asteroids. It is conducted at the Steward Observatory's Catalina Station, located near Tucson, Arizona, in the United States.
Astronomy Picture of the Day (APOD) is a website provided by NASA and Michigan Technological University (MTU). According to the website, "Each day a different image or photograph of our universe is featured, along with a brief explanation written by a professional astronomer." The photograph does not necessarily correspond to a celestial event on the exact day that it is displayed, and images are sometimes repeated. However, the pictures and descriptions often relate to current events in astronomy and space exploration. The text has several hyperlinks to more pictures and websites for more information. The images are either visible spectrum photographs, images taken at non-visible wavelengths and displayed in false color, video footage, animations, artist's conceptions, or micrographs that relate to space or cosmology. Past images are stored in the APOD Archive, with the first image appearing on June 16, 1995. This initiative has received support from NASA, the National Science Foundation, and MTU. The images are sometimes authored by people or organizations outside NASA, and therefore APOD images are often copyrighted, unlike many other NASA image galleries.
Fred Espenak is a retired emeritus American astrophysicist. He worked at the Goddard Space Flight Center. He is best known for his work on eclipse predictions.
A total solar eclipse took place on June 21, 2001, with a magnitude of 1.0495. It was the first solar eclipse of the 21st century. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Occurring 2.2 days before perigee, the Moon's apparent diameter was larger. Depending on the zone it, could be seen June 20–22
Michael David Reynolds was an American author and educator who served as professor of astronomy at Florida State College at Jacksonville in Jacksonville, Florida. He served as the director of Chabot Space and Science Center in Alameda County, California. Reynolds was best known for his work in science education, both in lecture halls and less formal settings. He also participated in astronomy and space exploration outreach.
A total lunar eclipse occurred on 28 August 2007, lasting just over 90 minutes. The Moon entered the Earth's penumbra at 7:53:40 UTC. The first partial phase began in earnest at 8:51:16 UTC when the Moon entered the Earth's umbra. It exited the penumbra at 13:20:57 UTC.
The WestRock Observatory is operated by Columbus State University's Coca-Cola Space Science Center at 701 Front Avenue, Columbus, Georgia. Established in 1996, the observatory has active night sky and solar study programs for students and the general public. The equipment can be controlled and monitored remotely by faculty and astronomers. The observatory also offers mobile astronomy programs such as "Astronomy Nights" at Callaway Gardens, F. D. Roosevelt State Park, and Providence Canyon State Park as well as education outreach to the surrounding Georgia/Alabama area.
The Fairbanks Museum & Planetarium is a combination natural science museum, history museum, and planetarium located in St. Johnsbury, Vermont. It was founded in 1890 by businessman, politician, naturalist, and collector Franklin Fairbanks. The museum and its buildings are on the U.S. National Register of Historic Places.
A partial lunar eclipse took place on 16 August 2008, the second of two lunar eclipses in 2008, with the first being a total eclipse on 20 February 2008. The next lunar eclipse was a penumbral eclipse occurring on 9 February 2009, while the next total lunar eclipse occurred on 21 December 2010.
A total solar eclipse occurred at the Moon's descending node of the orbit on August 1, 2008. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. It had a magnitude of 1.0394 that was visible from a narrow corridor through northern Canada (Nunavut), Greenland, central Russia, eastern Kazakhstan, western Mongolia and China. Occurring north of the arctic circle, it belonged to the so-called midnight sun eclipses. The largest city in the path of the eclipse was Novosibirsk in Russia. Occurring only 2.5 days after perigee, the Moon's apparent diameter was larger than average.
A total solar eclipse occurred at the Moon’s descending node of the orbit on Thursday, July 11, 1991. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Totality began over the Pacific Ocean and Hawaii moving across Mexico, down through Central America and across South America ending over Brazil. It lasted for 6 minutes and 53.08 seconds at the point of maximum eclipse. There will not be a longer total eclipse until June 13, 2132. This was the largest total solar eclipse of Solar Saros series 136, because eclipse magnitude was 1.07997.
A partial lunar eclipse took place on 25 April 2013, the first of three lunar eclipses in 2013. Only a tiny sliver (1.48%) of the Moon was covered by the Earth's umbral shadow at maximum eclipse, but the entire northern half of the Moon was darkened from being inside the penumbral shadow. This was one of the shortest partial eclipses of the Moon for the 21st century, lasting 27 minutes. This was the last of 58 umbral lunar eclipses of Lunar Saros 112.
A total lunar eclipse took place on 15 April 2014. It was the first of two total lunar eclipses in 2014, and the first in a tetrad. Subsequent eclipses in the tetrad are those of 8 October 2014, 4 April 2015, and 28 September 2015. Occurring 6.7 days after apogee, the Moon's apparent diameter was smaller.
A total lunar eclipse took place on 4 April 2015. It is the former of two total lunar eclipses in 2015, and the third in a tetrad. Other eclipses in the tetrad are those of 15 April 2014, 8 October 2014, and 28 September 2015.
A partial lunar eclipse took place at the Moon's descending node on the evening of 7 August and the morning pre-dawn on 8 August 2017, the second of two lunar eclipses in 2017. The Moon was only slightly covered by the Earth's umbral shadow at maximum eclipse. The Moon's apparent diameter was smaller because the eclipse occurred only 5 days after apogee.
A total solar eclipse occurred on March 20, 2015. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with a partial solar eclipse visible over a surrounding region thousands of kilometres wide. This total solar eclipse is notable in that the path of totality passed over the North Pole. Totality was visible in the Faroe Islands and Svalbard.
Peter B. Lawrence is a British amateur astronomer best known for being a presenter on the BBC's The Sky at Night. He is also well known for his high resolution images of the Sun, Moon and planets and specialises in taking images of time-limited phenomena such as eclipses and the aurora.
Brandon M. Easton is a professional writer, screenwriter, and educator based in Los Angeles, California. Easton was born in Baltimore, Maryland and resides in Southern California. Easton is mainly known for his work on the Warner Bros. Animation reboot of the ThunderCats series as well as critical acclaim for his work in the comic book industry.
Petr Horálek is a Czech astrophotographer, popularizer of astronomy and an artist.
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