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- ══════════════════════════ EZCosmos Picture Directory ═════════════════════════
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- Use the arrow keys and press Enter to browse the directory below.
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- To view a picture in Plot mode, first Find the desired object (or
- center it under the cursor) and then use the Look command. See
- the main Help Menu for more information on looking at pictures.
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- ──> Press Esc or spacebar to exit the Help System <──
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- ║ Picture Disk 1....... NGC Objects and Planets ║
- ║ Picture Disk 2....... Selected Messier Objects ║
- ║ Other Picture Disks.. Available from Future Trends Software ║
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- ══════════════════════════════ Picture Disk 1 ════════════════════════ Page 1.1
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- NGC2024 The Horsehead nebula in Orion - a dark dust cloud which lies in front
- of the emission nebula IC434. The dust cloud is colliding with the
- emission nebula. Some astronomers theorize that this may be the
- first stage in the formation of stars.
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- NGC2264 The Cone Nebula in Monoceros - another example of a dark dust cloud
- silhouetted on an emission nebula. The presence of hot young stars
- indicates that the emission nebula is a birthplace of stars and
- further supports the theory that collisions of gas and dust clouds
- result in stellar formation.
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- NGC5128 Centaurus A - a peculiar and energetic galaxy in Centaurus. This
- galaxy is one of the strongest emitters of radio waves in the sky and
- was one of first radio sources discovered when radiotelescopes were
- built in Australia. Radio astronomers have since learned that
- Centaurus A is a double radio source. It appears that the visible
- galaxy in the center is ejecting vast amounts of material in opposite
- directions at near the speed of light. This material, when slowed
- down by collision with intersteller dust and gas then emits radio
- waves through interaction with galactic magnetic fields.
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- ────────────────────────────── Picture Disk 1 ──────────────────────── Page 1.2
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- LMC The Large Magallenic Cloud - satellite galaxy of the Milky Way
- named after the Spanish explorer Magellan who discovered it and
- its companion the Small Magellanic Cloud during his trip around
- the world in 1519. The LMC shows characteristics of a barred
- spiral form and is classified as a transition type between a
- spiral and an irregular galaxy. Both the LMC and SMC are orbiting
- the Milky Way. The LMC is closer, about 160,000 light years from
- us, and is also larger than the SMC. Both galaxies are easily
- visible to the unaided eye.
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- Offset from the center of the LMC is the Tarantula Nebula. This
- is the only extragalactic nebula visible to the unaided eye and is
- striking when seen in medium to large telescopes. It is just at
- the limit of naked eye visibility and was classified in error as
- the star 30 Doradus before its nature was fully understood. It
- can be seen in the picture left of center. Measurements indicate
- that this nebula is actually the core of the LMC even though it
- appears to be off-center from the rest of the galaxy.
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- ────────────────────────────── Picture Disk 1 ──────────────────────── Page 1.3
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- MOON The Earth and Moon form a double-planet system. The Moon is the
- closest astronomical body to the Earth and we know more about it
- than any other object in the heavens. Many surface features are
- visible to the unaided eye, and a pair of binoculars reveals a great
- amount of detail. A small telescope shows vast seas of lava, large
- mountain ranges and hundreds of craters of all sizes. Studies of the
- 382 kg of lunar rock and soil brought back by the Apollo missions
- have revealed much about the early history of both the Moon and the
- Earth.
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- SATURN The sixth planet from the Sun is perhaps the best known astronomical
- object by picture. Its beauty in even small telescopes is
- breathtaking, and larger scopes reveal details in the delicate ring
- structure and colored bands in the outer layers of the atmosphere.
- The rings consist of billions of particles (probably water and
- methane ice) ranging from a few centimeters to a few meters in
- diameter. There are three major ring systems, separated by the
- Cassini division (outer) and the Encke division (inner). Saturn is
- 1.4 billion km from the Sun (about 80 light minutes).
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- ══════════════════════════════ Picture Disk 2 ════════════════════════ Page 2.1
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- M1 The Crab Nebula in Taurus - the remnants of a supernova that exploded
- in A.D. 1064. The supernova was visible for several weeks in broad
- daylight. The star that remains is the first pulsar discovered. Now
- known to be a neutron star, it rotates on its axis once every 33
- milliseconds. The nebula shines brighter than 75,000 Suns.
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- M13 The Great Globular Cluster in Hercules - a spectacular cluster of
- several hundreds of thousands of older stars that orbits the Milky Way
- Galaxy. M13 is the brightest globular cluster visible in the Northern
- Hemisphere. Its distance from Earth is about 25,000 light years.
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- M20 The Trifid Nebula in Sagittarius - a cloud of interstellar gas
- illuminated by a relatively new star (age 7 million years).
- Three dark radial dust lanes divide the cloud, hence its name.
- M20 is about is 4500 light years (ly) from Earth.
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- M27 The Dumbbell Nebula in Vulpecula - a planetary nebula, named due to
- its resemblance to a dumbbell when seen through small telescopes.
- Planetary nebulae were named in the 18th century by Sir William
- Herschel who likened their telescopic appearance to that of the
- planets Uranus and Neptune.
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- ────────────────────────────── Picture Disk 2 ──────────────────────── Page 2.2
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- M31 The Great Galaxy in Andromeda - the largest galaxy in the Local Group
- which includes our Galaxy, the Milky Way. M31 is a spiral galaxy of
- radius 80,000 ly with a mass of 300 billion suns. We see it nearly
- edge on - from our viewpoint it is tilted at an angle of 13°. At a
- distance of 2,300,000 ly it is the farthest object visible to the
- naked eye. M31 can be seen without optical aid from sites away from
- city lights when the Moon is below the horizon. With a telescope,
- the two satellite galaxies NGC205 and M32 can be seen in the same
- field (and are shown in the picture at left center and bottom right).
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- M42 The Orion Nebula - the middle 'star' in the sword of Orion the
- Hunter. M42 can be seen without optical aid as a hazy star, but
- through even a small telescope it is a magnificent sight. M42 is the
- brightest nebula visible from Earth and is thus the best studied.
- Its distance is 1600 ly - relatively close. Many new stars are
- forming in the interior of the cloud and several proto-solar systems
- have been discovered with infrared astrophotography. Six inch and
- larger telescopes reveal a cluster of four stars at the heart of the
- nebula called the Trapezium (the stars form the corners of a regular
- trapezoid). These stars are among the youngest yet discovered.
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- ────────────────────────────── Picture Disk 2 ──────────────────────── Page 2.3
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- M45 The Pleiades or Seven Sisters in Taurus - one of the finest examples
- of a young star cluster. The cluster can be easily seen with the
- unaided eye. Ancient astronomers reported seeing seven stars in M45,
- but today only six are visible without optical aid. Long exposure
- photography shows much nebulosity in the region, the gas clouds from
- which these stars were formed. The cluster is very young, less
- than 100 million years old. Nearby is an older cluster, the Hyades,
- of which Aldebaran (Alpha Tauri) is a member.
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- M57 The Ring Nebula in Lyra - a planetary nebula resembling a torus
- or ring. M57 is a fine object visible in small telescopes, but a
- large scope is needed to glimpse its 13th magnitude central star
- which is a white dwarf. The age of the nebula (and thus the
- death of the central star) is estimated at 5500 years and its
- distance exceeds 2000 ly.
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- M104 The Sombrero Galaxy in Virgo - a spiral galaxy characterized by a dark
- band of dust through its center which obscures the central bulge or
- core. M104 is tilted only 6° from our line of sight. Its central core
- is quite prominent - M104 resembles an elliptical galaxy with
- spiral arms tightly wound around it.
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- ══════════════════════════ Additional Picture Disks ══════════════════ Page 3.1
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- Astrosoft, Inc. and Future Trends Software are pleased to
- announce the release of several new Picture Disk sets, available
- April 1990. Each two-disk set contains over 14 pictures of
- galaxies, star clusters, nebulae and planets with informative
- text describing each object shown. These Picture Disk sets are
- compatible only with EZCosmos II and EZCosmos Professional.
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- New Picture Disk sets will be released every 6 to 8 weeks.
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- For information and ordering, please contact:
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- FUTURE TRENDS SOFTWARE
- P.O. BOX 3927
- AUSTIN, TX 78764
- 1 (800) 869-EASY
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- This EZCosmos Picture Directory is (c) Copyright 1990 Astrosoft, Inc.
- All rights reserved worldwide.
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-