Astronomy Now Home
Home Magazine Resources Store

On Sale Now!

The October 2014 issue of Astronomy Now is on sale! Order direct from our store (free 1st class post & to UK addresses). Astronomy Now is the only astronomy magazine specially designed to be read on tablets and phones. Download the app from Google Play Store or the Apple App Store.

Top Stories

Earthshine used to test life detection method
...By imagining the Earth as an exoplanet, scientists observing our planet's reflected light on the Moon with ESO's Very Large Telescope have demonstrated a way to detect life on other worlds...

Solid buckyballs discovered in space
...Astronomers using NASA’s Spitzer Space Telescope have detected a particular type of molecule, given the nickname “buckyball”, in a solid form for the first time...

Steamy water-world gets the Hubble treatment
...Hubble Space Telescope observations of a 7 Earth-mass planet find an unusual water-rich world swathed in a thick, steamy atmosphere...

Eight years on Mars
for Opportunity

Posted: 25 January 2012

Bookmark and Share

NASA's Mars Exploration Rover Opportunity landed on Mars eight years ago today on what was expected to be just a 90 day mission, and while twin rover Spirit has remained silent since March 2010, Opportunity continues to rove across the red planet's surface.

Approaching Greeley Haven on the rim of Endurance Crater in early January. Image: NASA/JPL-Caltech.

Greeley Haven is Opportunity's current workplace, an outcrop with a Sun-facing slope that will allow the aging rover to soak up solar power during its fifth Martian winter. Within reach of the rover's robotic arm are plentiful sites for scientific investigation, including inspection of mineral compositions and textures within the outcrop. A full-circle colour panorama is also on the schedule along with a radio science experiment that will record information about the tiny wobbles in Mars' rotation to provide insight into the planet's interior.

Opportunity recently identified a bright mineral vein deposited by water. It is about the width of a human thumb and spans 50cm in length. Image: NASA/JPL-Caltech/Cornell/ASU/.

The rover's winter worksite lies on the rim of 22 kilometre-wide Endeavour Crater, which it reached nearly six months ago having traversed 21 kilometres over three years from smaller Victoria Crater.

Although Spirit ceased communications in March 2010, both rovers have made important discoveries about wet environments on ancient Mars. Opportunity now enters its ninth year of exploration and despite dust-covered solar panels, shows no signs of giving up yet.

The view from Opportunity's landing site eight years ago, from within an impact crater at Meridiani Planum. Outcrops can be seen to the right. Image: NASA/JPL/Cornell.

Image on front page: NASA/JPL-Caltech/Cornell. Rover model by Dan Maas, synthetic image by Zareh Gorjian, Koji Kuramura, Mike Stetson and Eric M. De Jong.

The Planets
From tiny Mercury to distant Neptune and Pluto, The Planets profiles each of the Solar System's members in depth, featuring the latest imagery from space missions. The tallest mountains, the deepest canyons, the strongest winds, raging atmospheric storms, terrain studded with craters and vast worlds of ice are just some of the sights you'll see on this 100-page tour of the planets.

Hubble Reborn
Hubble Reborn takes the reader on a journey through the Universe with spectacular full-colour pictures of galaxies, nebulae, planets and stars as seen through Hubble's eyes, along the way telling the dramatic story of the space telescope, including interviews with key scientists and astronauts.

3D Universe
Witness the most awesome sights of the Universe as they were meant to be seen in this 100-page extravaganza of planets, galaxies and star-scapes, all in 3D!


© 2014 Pole Star Publications Ltd.