NASA probe New Horizons crosses Neptune’s orbit

The spacecraft is scheduled to pass through the Pluto system on July 14, 2015 and will map the dwarf planet, its five known moon's surface and search for a ring system.

Technicians working on the payload for the New Horizons mission to the planet Pluto.

NASA probe, New Horizons, passed Neptune’s orbit on Monday, nearly 25 years after Voyager 2 spacecraft executed the first-ever flyby of faraway Neptune and its icy moon Triton.

It was a perfect time for the New Horizons team to pay tribute to Voyager 2. “We stand on the shoulders of giants - like Voyager project scientist Ed Stone and his Voyager science team that pioneered how to do the exploration of the deep outer solar system,” Alan Stern, principal investigator of New Horizons, told the media.

New Horizons is scheduled to pass through the Pluto system on July 14, 2015. The New Horizons probe took a photo of Neptune and its moon Triton - nearly 4 billion km away at the time.

Astronomers are expecting surprising results when New Horizons reaches Pluto because very little is known about the dwarf planet. It is so dim and far away that the best photos by NASA’s powerful Hubble Space Telescope show Pluto as a blur of pixels, space.com reported.

“Everything that we know about the Pluto system today could probably fit on one piece of paper,” Stern added.

New Horizons will map the dwarf planet and its five known moons, determine the composition of Pluto’s surface and atmosphere, search for undiscovered moons and a ring system.