Space
We summarize the week's scientific breakthroughs every Thursday.
- Planetary Science
Muddying the Water? Orbiter drains confidence from fluid story of Mars
New images of Mars diminish the evidence that liquid water has flowed on some parts of the planet, but bolster the case in other places.
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- Planetary Science
Survivor: Extrasolar planet escapes stellar attack
An extrasolar planet survived after its aging parent star ballooned into a red giant that almost engulfed it.
- Astronomy
Bloated planet
A newly discovered exoplanet is the largest and lowest-density such object yet found.
- Astronomy
Major merger
Four galaxies are ramming into each other in one of the biggest cosmic collisions ever recorded.
- Planetary Science
A different view of Uranus’ rings
The rings of Uranus are now tilted edge on to Earth, revealing small, inner rings made of fine dust.
- Astronomy
Killer Collision: Dino demise traces to asteroid-family breakup
The asteroid that wiped out the dinosaurs 65 million years ago was a wayward fragment from a violent collision in the asteroid belt.
- Astronomy
Dawn of a Disk: Water vapor pours down on embryonic star
Infrared observations show water vapor pouring down on a planet-forming disk around a young star.
- Astronomy
Separation Anxiety: Cosmic collision may shed light on dark matter
The debris from an ancient collision of galaxy clusters seems to show cosmic dark matter behaving in a puzzling way.
- Planetary Science
Geyser gawker: Plans for a closer look at Enceladus
The Cassini spacecraft will change course to take a close look next March at plumes of water vapor emanating from the south pole of Saturn's moon Enceladus.
- Planetary Science
Idiosyncratic Iapetus
The strange appearance of Saturn's moon Iapetus suggests that it was frozen in shape soon after birth, providing a glimpse into conditions in the early solar system.
- Astronomy
Veiled black holes
Many X ray sources in the sky could be active galactic nuclei smothered by gas and dust that blocks their emission of visible and ultraviolet light.
