Densest Nearby Galaxy May Have Been Found by Hubble and Chandra
Astronomers using NASA’s Hubble Space Telescope and Chandra X-ray Observatory and telescopes on the ground may have found the most crowded galaxy in our part of…
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Comet ISON Seen by Amateur Astronomers
A useful point of comparison is Comet Lovejoy, which put on a grand show after it brushed the sun in 2011. People in the southern hemisphere…
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ESA’s space missions are getting ready to observe an icy visitor to the inner Solar System: Comet ISON, which might also be visible in the night…
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A Fiery Solar Explosion
Like a dragon breathing fire, a powerful blast of plasma erupts from the Sun in this colourised view of a ‘coronal mass ejection’. These huge clouds…
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Milestone: Voyager 1 Officially Leaves the Solar System for Interstellar Space
NASA’s Voyager 1 spacecraft officially is the first human-made object to venture into interstellar space. The 36-year-old probe is about 12 billion miles (19 billion kilometers)…
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Venus and Moon in Conjunction on Sept. 8
The moon orbits the Earth and the Earth, along with the other planets in the solar system, orbit the sun. Any alignment of the objects in…
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Why Does February Have Only 28 Days?
We inherited our calendar from the Romans (the Greeks and Egyptians had their own, different calendars). [We inherited our base-60 time and measurement systems (minutes, seconds,…
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Giant Black Hole Rejecting Material Spotted by Chandra X-Ray Observatory
Astronomers using NASA’s Chandra X-ray Observatory have taken a major step in explaining why material around the giant black hole at the center of the Milky…
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Comet ISON Is Paying a Visit to the Red Planet
Around the world, astronomers are buzzing with anticipation over the approach of Comet ISON. On Thanksgiving Day 2013, the icy visitor from the outer solar system…
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New Adaptive Optics System Allows Telescope to Take Images Twice as Sharp as Hubble
Thanks to new technology developed in part at the University of Arizona, astronomers can now view objects in the sky at unprecedented sharpness in visible light.…
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