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Planetaria
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SETI researchers are buzzing about a strong spike in radio signals that seemed to come from the direction of a sunlike star in the constellation Hercules.
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For a long time now, there has been growing interest in sending a mission back to Jupiter to better study one moon in particular: Europa. Previous missions such as Voyager and Galileo showed us this world up close for the first time, revealing a place that maybe, just maybe, is home to some kind of...
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I'm still wondering if there is any relation to the similar-looking, but much smaller, dark streaks seen on slopes by the Curiosity rover?﻿
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We present the discovery of a brown dwarf companion to the debris disk host star HR 2562. This object, discovered with the Gemini Planet Imager (GPI), has a projected separation of 20.3$\pm$0.3 au (0.618$\pm$0.004") from the star. With the high astrometric precision afforded by GPI, ...
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Astronomers today announced one of the most exciting exoplanet discoveries yet: an Earth-mass rocky world orbiting the nearest star to the Sun, Proxima Centauri. There had been hints before of such a world, but nothing was confirmed, until now. The planet, called Proxima b, is not only just slightly more massive than Earth, it orbits...
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Hmm...﻿
A candidate signal for SETI is a welcome sign that our efforts in that direction may one day pay off. An international team of researchers has announced the detection of “a strong signal in the dir...
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"We use our GCM to produce reflection/emission spectra and phase curves. We find that atmospheric characterization will be possible by direct imaging with forthcoming large telescopes thanks to an angular separation of 7λ/D at 1~μm (with the E-ELT) and a contrast of ∼10−7. The magnitude of the planet will allow for high-resolution spectroscopy and the search for molecular signatures."﻿
Abstract: Radial velocity monitoring has found the signature of a $M \sin i = 1.3$~M$_\oplus$ planet located within the Habitable Zone of Proxima Centauri, (Anglada-Escud\'e et al. 2016). Despite a hotter past and an active host star the planet Proxima~b could have retained enough volatiles to ...
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Juno will be getting very close to Jupiter this Saturday!﻿
This Saturday, NASA's Juno spacecraft will get closer to the cloud tops of Jupiter than at any other time during its prime mission.
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The Curiosity rover is continuing to travel through the ancient and eroded buttes and mesas which are part of the Murray Buttes formation. Very reminiscent of the terrain in the desert regions of the American southwest. Included are a couple new panoramas, processed by Thomas Appéré. All images are available on the mission website. Share the...
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A good overview of the possible habitability of Proxima Centauri b.﻿
Habitability of Proxima Centauri b
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Artist's conception of what Proxima b might look like. It is just slightly more massive than Earth and orbits in its star's habitable zone. Temperatures might allow liquid water to exist on...
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In their circles
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Contact info
 Email paulscottanderson@mac.com
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exploring alien worlds
Introduction
The Meridiani Journal is a chronicle of planetary exploration and discovery, both in our own solar system and beyond.

The name is derived from the desert plains of Meridiani Planum on Mars, where the Opportunity rover landed in 2004.

Many recent discoveries, such as the geysers of Enceladus, the subsurface ocean of Europa, the methane lakes and seas of Titan and the growing number of exoplanets found orbiting other stars make this an exciting time of exploration and discovery.

TMJ is published by space writer and blogger Paul Scott Anderson, a life-long space exploration supporter and member of The Planetary Society. He also writes for The Spaceflight GroupAmericaSpaceUniverse Today and Examiner.com.