solar system
Spacecraft buzzes Jupiter’s mega moon, 1st close-up in years
NASA’s Juno spacecraft has provided the first close-ups of Jupiter’s largest moon in two decades.
Juno zoomed past icy Ganymede on Monday, passing within 645 miles (1,038 kilometers). The last time a spacecraft came that close was in 2000 when NASA’s Galileo spacecraft swept past our solar system’s biggest moon.
Read:NASA picks Venus as hot spot for two new robotic missions
NASA released Juno’s first two pictures Tuesday, highlighting Ganymede’s craters and long, narrow features possibly related to tectonic faults. One shows the moon’s far side, opposite the sun.
“This is the closest any spacecraft has come to this mammoth moon in a generation,” said Juno’s lead scientist, Scott Bolton of the Southwest Research Institute in San Antonio. “We are going to take our time before we draw any scientific conclusions, but until then we can simply marvel at this celestial wonder – the only moon in our solar system bigger than the planet Mercury.”
Read:Chinese cargo spacecraft docks with orbital station
Ganymede is one of 79 known moons around Jupiter, a gas giant. Italian astronomer Galileo Galilei discovered Ganymede in 1610, along with Jupiter’s three next-biggest moons.
Launched a decade ago, Juno has been orbiting Jupiter for five years.
3 years ago
NASA picks Venus as hot spot for two new robotic missions
NASA is returning to sizzling Venus, our closest yet perhaps most overlooked neighbor, after decades of exploring other worlds.
The space agency’s new administrator, Bill Nelson, announced two new robotic missions to the solar system’s hottest planet, during his first major address to employees Wednesday.
Read:Chinese cargo spacecraft docks with orbital station
“These two sister missions both aim to understand how Venus became an inferno-like world capable of melting lead at the surface,” Nelson said.
One mission named DaVinci Plus will analyze the thick, cloudy Venusian atmosphere in an attempt to determine whether the inferno planet ever had an ocean and was possibly habitable. A small craft will plunge through the atmosphere to measure the gases.
It will be the first U.S.-led mission to the Venusian atmosphere since 1978.
The other mission, called Veritas, will seek a geologic history by mapping the rocky planet’s surface.
Read:Forecast: 40% chance Earth to be hotter than Paris goal soon
“It is astounding how little we know about Venus,” but the new missions will give fresh views of the planet’s atmosphere, made up mostly of carbon dioxide, down to the core, NASA scientist Tom Wagner said in a statement. “It will be as if we have rediscovered the planet.”
NASA’s top science official, Thomas Zurbuchen, calls it “a new decade of Venus.” Each mission — launching sometime around 2028 to 2030 — will receive $500 million for development under NASA’s Discovery program.
The missions beat out two other proposed projects, to Jupiter’s moon Io and Neptune’s icy moon Triton.
The U.S. and the former Soviet Union sent multiple spacecraft to Venus in the early days of space exploration. NASA’s Mariner 2 performed the first successful flyby in 1962, and the Soviets’ Venera 7 made the first successful landing in 1970.
Read: Cosmic 2-for-1: Total lunar eclipse combines with supermoon
In 1989, NASA used a space shuttle to send its Magellan spacecraft into orbit around Venus.
The European Space Agency put a spacecraft around Venus in 2006.
3 years ago
IDCOL partners propose installation of solar system at hospitals, community clinics
Partners of Infrastructure Development Company Limited (IDCOL)want to install solar system at all the hospitals including 18,000 community clinics, 100,000 solar-powered irrigation pumps and1 million solar street lights in rural areas across the country.
4 years ago