#959 A Triple Eclipse on Jupiter February 02, 1998“Part of Jupiter is missing. Actually, three parts appear to be missing. In reality though, the three dark spots seen in the above photograph are only

#952 Interplanetary Spacecraft Passes Earth January 26, 1998“Last Thursday an interplanetary spacecraft flew right past the Earth. The above images show sunlight momentarily reflected from this spacecraft's

#945 The Hubble 5 Planetary Nebula January 19, 1998“The Hubble Double Bubble Planetary Nebula is bubbling over with excitement. More mundanely known as Hubble 5, this bipolar planetary nebula is being

#938 The Keyhole Nebula January 12, 1998“The dark dusty Keyhole Nebula gets its name from its unusual shape. Officially designated NGC 3324, the Keyhole Nebula is a smaller region superposed on the larger

#929 The Barren Moon January 03, 1998“The above photo, taken as the Apollo 17 astronauts orbited the Moon in 1972, depicts the stark lunar surface around the Eratosthenes and Copernicus craters. Many similar

#922 Keck: The Largest Optical Telescopes December 27, 1997“In buildings eight stories tall rest mirrors ten meters across that are slowly allowing humanity to map the universe. Alone, each is the world's

#914 NGC 6826: The Blinking Eye December 19, 1997“The colorful planetary nebula phase of a sun-like star's life is brief. Almost in the "blink of an eye" - cosmically speaking - the star's outer

#904 Mysterious Features on Ganymede December 09, 1997“Where is the rest of the circle? Jupiter's largest moon Ganymede has some truly unusual terrain, including the pictured half circle above cut by nearly

#894 Lasers in Eta Carinae November 29, 1997“Have you heard about the great LASER light show in the sky? A team led by K. Davidson (U. Michigan) and S. Johansson (U. Lund) discovered that the chaotically

#887 Surveyor Hops November 22, 1997“This panorama of the cratered lunar surface was constructed from images returned by the US Surveyor 6 lander. Surveyor 6 was not the first spacecraft to accomplish

#879 Irregular Galaxy Sextans A November 14, 1997“Grand spiral galaxies often seem to get all the glory. Their newly formed, bright, blue star clusters found along beautiful, symmetric spiral arms are

#872 Evidence for Frame Dragging Black Holes November 07, 1997“Gravity can do more than floor you. According to recent measurements of a star system thought to contain a black hole, it can spin you too.

#864 3-D View Of Jupiter's Clouds October 30, 1997“very day is a cloudy day on Jupiter, the Solar System's reigning gas giant. This 3-dimensional visualization presents a simplified model view from between

#856 The Antennae Galaxies October 22, 1997“A ground-based telescopic view (left) of the collision between the galaxies NGC4038 and NGC4039 reveals long arcing insect-like "antennae" of luminous

#847 Ice Clouds over Mars October 13, 1997“Mars has clouds too. The above true color image taken in August by Mars Pathfinder shows clouds of ice high in the Martian atmosphere. Unlike Earth's atmosphere

#840 Surveyor At Mars October 06, 1997“Mars Global Surveyor achieved Martian orbit on September 11 and began aerobraking into its final mapping orbit, a process that will take until March next year.

#830 A Lonely Neutron Star September 26, 1997“How massive can a star get without imploding into a black hole? These limits are being tested by the discovery of a lone neutron star in space. Observations

#822 Erupting Sun September 18, 1997“On August 27th twisting magnetic fields propelled this huge eruptive prominence a hundred thousand miles above the Sun's surface. The seething plasma of ionized gases

#815 Mars Global Surveyor: Aerobraking September 11, 1997“Completing a 10 month journey, another spacecraft from Earth arrives at Mars today. The Mars Global Surveyor (MGS) is scheduled to fire its main

#808 Rivers in the Sun September 04, 1997“The surface of the Sun is shifting. By watching sunspots, it has long been known that our Sun rotates. It was also known that the center of the Sun rotates faster