It’s Been 32 Years Since We Last Explored Uranus

Voyager 2 may have been the second of NASA’s famous twin exploration spacecraft but it actually launched first, on August 20, 1977. Eight and a half years later it became the first (and, to date, last) spacecraft to visit Uranus, at 31,500 miles across the third largest planet in the Solar System. Voyager 2 made its closest…

Spacecraft Down: Cassini is Gone

It’s official: Cassini’s mission at Saturn is over. Today, at 6:31 a.m. EDT (10:31 UTC), Cassini entered the atmosphere of Saturn. A little over a minute later it sent its final transmission back to Earth before succumbing to the physical forces of entry. That signal, Cassini’s last piece of data, ended at 7:55 a.m. EDT…

It’s Time to Say Goodbye to Cassini

Well, the day has come. Today is the last full day that NASA’s Cassini spacecraft will exist, and in fact right now it is on its final path—a grand soaring arc that will send it down into the atmosphere of Saturn itself on the morning of Friday, Sept. 15. It will be the closest to the…

It’s Been 31 Years Since We Last Visited Uranus

Voyager 2 may have been the second of NASA’s famous twin exploration spacecraft but it launched first, on August 20, 1977. Eight and a half years later it became the first (and last) spacecraft to visit Uranus, at 31,500 miles across the third largest planet in the Solar System. Voyager 2 made its closest pass by Uranus…

It’s Time to Say Bon Voyage to Venus Express

Launched in 2005, the European Space Agency’s Venus Express successfully entered orbit around our cloud-shrouded neighboring world. Now, after more than eight and a half years of scientific observations Venus Express has run out of fuel and will soon go gentle into that good night – that is if by “going gentle” you mean death-diving…

Fastest, Farthest, First: New Horizons Closing in on Pluto

It’s a journey spanning 85 years and billions of miles: humanity’s first-ever encounter with the dwarf planet system of Pluto and Charon, located in the frozen far reaches of our Solar System where our entire planet is a barely-visible pale blue dot — just a “mote of dust suspended in a sunbeam.” Launched in 2006,…

Galileo’s Visit with an Asteroid, 22 Years Ago Today

Launched on its historic voyage to Jupiter on October 18, 1989, NASA’s Galileo spacecraft also got some good looks at several members of our solar system before it reached the giant planet — and one of them was the 12-mile-long asteroid Gaspra, of which it made its closest pass on October 29, 1991. The image…

This is Earth From Juno

Last Wednesday, Oct. 9, 2013, NASA’s Juno spacecraft made a slingshot pass of Earth in order to get the necessary speed boost to reach Jupiter in 2016. As it came within 347 miles of our planet’s surface, passing closest over the southern Atlantic at 3:21 p.m. EDT, it used its JunoCam (developed by the San…

NASA’s Juno Spacecraft to Fly By Earth Today, Destined for Jupiter

Today’s the day! NASA’s Juno* spacecraft, launched back on August 5, 2011 (I should know, I was there) will get a little help from its friends (that’s us!) as it passes by Earth to get a gravitational power-boost on its way to Jupiter. The exact time of Juno’s closest approach is 3:21 p.m. EDT (12:21…

Voyager’s Visit to Uranus

Voyager 2 may have been the second of NASA’s twin exploration spacecraft but it launched first, 35 years ago today on August 20, 1977. 8 1/2 years later it became the first (and last!) spacecraft to visit the gas giant Uranus, the third largest planet in the Solar System.

Success! Mercury has a new satellite named MESSENGER!

During a week of not-so-great news in the world (to understate things by quite a lot) it’s nice to report something good: the MESSENGER spacecraft has successfully established orbit around the planet Mercury, beginning its new 12-month mission of mapping and researching the innermost planet of our solar system! After traveling nearly 5 billion miles…