Planetary archive: Jupiter, Europa and Io

Europa floats in front of Jupiter's turbulent clouds below. Credit: NASA / JPL-Caltech
Europa floats in front of Jupiter’s turbulent clouds below, as seen by Voyager 1 in 1979.
Click for larger version. Credit: NASA / JPL-Caltech

These are a couple of great images from many years ago, taken by the Voyager 1 spacecraft as it passed Jupiter. The first, in dramatic black & white, shows the moon Europa (with its subsurface ocean) passing in front of Jupiter’s turbulent clouds below, including the Great Red Spot on the left. It kind of looks like a Van Gogh painting, but it’s very real.

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New study says Pluto may have up to ten more moons

The five known moons of Pluto in an image taken by the Hubble Space Telescope. Credit: NASA / ESA / M. Showalter (SETI Institute)
The five known moons of Pluto in an image taken by the Hubble Space Telescope.
Credit: NASA / ESA / M. Showalter (SETI Institute)

When Pluto was first discovered, it wasn’t known if it had any moons, and it was already a tiny world itself, smaller than Mercury (which doesn’t have any moons). As of last year however, five moons have been found orbiting Pluto! Now a new study announced today suggests that there may be up to ten more little moons or moonlets keeping Pluto company in the outer fringes of the solar system.

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Curiosity rover finds ancient Mars was suitable for life

Bedrock seen by the Opportunity rover (right) which formed in acidic water and bedrock at the Curiosity landing site (right) which formed in non-acidic, pH neutral water, as found in a lakebed. Credit: NASA / JPL-Caltech / Cornell / MSSS
Bedrock seen by the Opportunity rover (left) which formed in acidic water and bedrock at the Curiosity landing site (right) which formed in non-acidic, pH neutral water, as found in a lakebed. Credit: NASA / JPL-Caltech / Cornell / MSSS

The analysis results of the first-ever rock drilling on Mars, by the Curiosity rover, were announced today by NASA at a press briefing in Washington. The new findings indicate that ancient Mars, at least in this area, was habitable and could have supported some form of life.

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Gemini Planet Imager: new telescope will photograph distant worlds

Simulation of planets imaged by the Keck Telescope (left) compared to GPI (right). Credit: Christian Marois / Herzberg Institute of Astrophysics and Marshall Perrin/Space Telescope Science Institute
Simulation of planets imaged by the Keck Telescope (left) compared to GPI (right).
Credit: Christian Marois / Herzberg Institute of Astrophysics and Marshall Perrin/Space Telescope Science Institute

For those who wonder about alien worlds out there, this is an exciting time of discovery. The number of exoplanets found so far is now well into the thousands and rapidly growing. The one downside – if you can call it that – is that these planets, with just a few exceptions, have been discovered by methods other than direct imaging. So there are still precious few actual photos of any of these far-off worlds. But a new “extreme” telescope is set to start changing that.

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