AmericaSpace Launch Countdown

Next Launch AsiaSat-6 on a Falcon 9 rocket from Cape Canaveral AFB, FL
scheduled for:
27 Aug 14 4:50:00 GMT
27 Aug 14 0:50:00 EDT

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A Shrinking, Icy Moon: 25 Years Since Voyager 2's Mission to Neptune (Part 4)

Neptune and its large moon, Triton, as seen by Voyager 2, three days after closest approach. Photo Credit: NASA

Twenty-five years ago, this week, humanity braced itself for its last, first-time, close-up glimpse of a new planet in the 20th century. NASA’s Voyager 2 spacecraft, launched in August 1977, had already conducted a breathtaking [...]

A Windy World: 25 Years Since Voyager 2's Mission to Neptune (Part 3)

The Great Dark Spot and Bright Companion, together with the chevron-like “Scooter” and D-2, are visible in this Voyager 2 image of Neptune. Photo Credit: NASA

Twenty-five years ago, this week, humanity braced itself for its last, first-time, close-up glimpse of a new planet in the 20th century. NASA’s Voyager 2 spacecraft, launched in [...]

A Troubled Start to a Triumphant Mission: 37 Years Since the Launch of the Voyagers

Voyager 2 begins its journey of exploration, 37 years ago today (20 August), with a rousing liftoff atop a Titan IIIE-Centaur booster from Launch Complex (LC)-41 at Cape Canaveral. Photo Credit: NASA

A quarter-century ago, this week, NASA’s Voyager 2 spacecraft became the first machine fashioned by human hands to travel close to the [...]

A Risky Rendezvous: 25 Years Since Voyager 2's Mission to Neptune (Part 2)

High-altitude clouds of Neptune, as seen by Voyager 2. Photo Credit: NASA

Twenty-five years ago, this week, humanity braced itself for its last, first-time, close-up glimpse of a new planet in the 20th century. NASA’s Voyager 2 spacecraft, launched in August 1977, had already conducted a breathtaking exploration of Jupiter and Saturn—together with its [...]

A Gigantic Radio Ear: 25 Years Since Voyager 2's Mission to Neptune (Part 1)

In spite of its immense distance from the Sun, Neptune proved a surprise in terms of the dynamism of its atmosphere. Photo Credit: NASA

Twenty-five years ago, this week, humanity braced itself for its last, first-time, close-up glimpse of a new planet in the 20th century. NASA’s Voyager 2 spacecraft, launched in August 1977, [...]

Astronomers Discover First Ice Giant Exoplanet Candidate in Long-Period Orbit

This artist’s concept shows Kepler-421b, a Uranus-sized transiting exoplanet with the longest known year, circling its star once every 704 days. Kepler-421b orbits an orange, K-type star that is cooler and dimmer than our Sun and is located about 1,000 light-years from Earth in the constellation Lyra. Image Credit/Caption: Harvard-Smithsonian, Center for Astrophysics/D. A. [...]

The Continuing Saga of Planet X: Could More Massive Planets Hide Beyond Pluto?

An artist’s impression of Eris, the most massive dwarf planet known to date, with an aphelion of 97 AU from the Sun. Could bigger Super-Earth-type planets be orbiting even farther out? Image Credit: ESO/L. Calçada and Nick Risinger

 

Just like the proverbial cat with nine lives, the notion of an unseen planet orbiting [...]

Solar System's Largest Moon Ganymede May Have 'Club Sandwich' Oceans

Illustration depicting the “club sandwich” layers of oceans and ice in Ganymede’s interior. Image Credit: NASA / JPL-Caltech

Europa and Enceladus, for good reason, have captured the attention and imagination of those searching for evidence of life elsewhere in our Solar System. Both moons are now thought to have subsurface oceans with conditions where [...]

Surprise Discovery: Rings Around an Asteroid!

Artist’s conception of the asteroid Chariklo with its ring system. Image Credit: ESO/L. Calçada/M. Kornmesser/Nick Risinger (skysurvey.org)

When it comes to planetary rings, what do you think of? Saturn is the first obvious thing that comes to mind, with its famous majestic ring system surrounding the gas giant planet. The other gas and ice [...]

That Friday Feelin': New Horizons to Pass Key Distance Milestone Today on Journey to Pluto

With 5 Astronomical Units of distance and just 90 weeks to go, New Horizons is primed and ready for its July 2015 rendezvous with Pluto. Image Credit: NASA

Friday is almost universally recognized as an indicator that the weekend draws inexorably closer … but for NASA’s New Horizons spacecraft, today will mark a milestone [...]