Top 10 Space Stories of 2015: Readers' Choice
Find out the results of this year's readers' choice poll for favorite space story of the year! Can you guess #1?
Every year, Discovery News turns to our faithful readers to see which space stories excited you the most and 2015 has been yet another incredible year for astronomy, spaceflight, planetary science and solar system discovery. After pulling together the nominations by considering web traffic over the past 12 months,
across social media and the top 10 quickly became obvious -- with a very clear winner. Can you guess which stories made it into the top 10? Read on to find out.
(Want to compare this year's top 10 with last year? Read "
With NASA's Dawn mission arriving at Ceres and New Horizons flying past Pluto, 2015 will forever be known as the "Year of the Dwarf Planet." But Ceres will forever be known as the dwarf planet we visited
. In March, the mission, that had made the slow transit from massive asteroid Vesta,
, revealing a fascinating, pock-marked surface. A puzzle quickly presented itself -- what the heck are those bright spots? Although Dawn is orbiting the tiny world closer than ever,
, highlighting just what a mysterious and fascinating place Ceres is.
Sure, it's a movie, but it's a movie that starred Matt Damon and co-starred SCIENCE! Not only did "The Martian" become a box office success, it was a rare movie that pleased scientists and the general public alike. There were a
, but overall, it was a science fiction movie that realized that scientific accuracy can drive a great story forward without having to unnecessarily stray into scientific fantasy.
While many of the headlines focus on its younger roving cousin, Curiosity, NASA's Mars Exploration Rover Opportunity is still exploring the Red Planet despite 10 years of dusty wear and tear. The veteran robot
, proving that
, can pay off. Be sure to keep an eye on this mission, it's not done with Mars quite yet.
The NASA/ESA Hubble Space Telescope is nothing short of a scientific and cultural phenomenon. Since 1990, the powerful space telescope has been pushing the boundaries of astronomical breakthroughs, refining our understanding of our place in the cosmos. And this year it celebrated its
quarter of a century
in space -- an incredible feat. As we look forward to the launch of NASA's James Webb Space Telescope (scheduled for 2018), we can only hope that Hubble's successor will have the longevity of the world's most famous space telescope.
continues to wow the world with incredible images and science from the slopes of Mount Sharp in the center of Gale Crater. The robotic geologist has not only revealed the stunning array of surface features the region has to offer, but it has also discovered potential for past habitable environments and
. It is a mission of epic proportions and has been a Reader's Choice favorite since it landed on the Red Planet in 2012 -- we can't wait to see what adventures Curiosity has in store for us in 2016.
After a decade of orbiting Saturn, NASA's Cassini mission has started
. Having most recently carried out its final flyby of enigmatic moon Enceladus, the spacecraft will begin maneuvers in 2016 that will ultimately see the mission fly through the planet's ring plane. Then, the spacecraft
, burning up in Saturn's atmosphere. 2015 has been a huge year for Cassini, revealing more incredible science about Saturn's system of moons, rings and dynamic atmosphere and we look forward to more science and beautiful images like this one
This story rapidly became 2015's viral story of the year because...
, but the mere hint of
was enough to throw the internet into a spin. But the best thing about this story is that NASA's Kepler space telescope was thrown into the limelight and the stunning science of exoplanet detection became an international talking point. Since the original detection of the weird transit signal discovered by citizen scientists of the Planet Hunters project, the SETI Institute has turned its powerful Allen Telescope Array at Tabby's Star
. Still, it doesn't mean it's
aliens, it just means there are far more likely explanations.
Ahhh, water on Mars. Yes, we already know that there's water ICE on Mars, but this time it's different. Well, it MIGHT be different. Way back in 2011, some strange seasonal channels were spotted by NASA's Mars Reconnaissance Orbiter on Martian slopes. Though they looked like channels created by flows of liquid water, scientists urged caution -- Mars' atmosphere is so cold and thin, only short-lived water ice should exist, right? But after orbital analysis this year, the chemical residue of these channels was analyzed, revealing that these channels may well be caused
. However, this water isn't your fresh mountain spring variety --
laced with perchlorates,
Commercial access to space has been ramping-up in recent years and 2015 has seen some of the biggest advances.
in 2014 and, though suffering its own huge setback with
in June, SpaceX returned with a
. Add these historic advances to
and we have seen 12 exciting months of commercial spaceflight successes not only to resupply the space station, but also to launch satellites and refine rocket technology. Next stop Mars?
It's been a long wait, but in July, NASA's New Horizons mission flew through the Pluto-Charon system for its
. The spacecraft, which took nearly a decade to reach the outer solar system, is now blasting through the Kuiper Belt and mission scientists are
for another flyby in 2019. But its Pluto flyby was just the beginning -- the spacecraft recorded so much data that it continues to beam back detailed information about the dwarf planet,
. This has been a historic year; we're finally seeing Pluto up-close and in high-definition for the first time since it was discovered by American astronomer Clyde Tombaugh in 1930.