’17 billion’ Earth-sized planets in Milky Way—study

The Milky Way contains at least 17 billion planets the size of Earth, and likely many more, according to a study out Monday that raises the chances of discovering a sister planet to ours.

The Milky Way contains at least 17 billion planets the size of Earth, and likely many more, according to a study out Monday that raises the chances of discovering a sister planet to ours.
Flying in formation around the moon, a pair of NASA probes began mapping the lunar gravity field in hopes of figuring out why Earth’s only natural satellite is shaped the way it is.
Some 8.7 million different species exist on Earth, though a tiny amount of those have actually been discovered and catalogued, researchers said Tuesday.

Iran has launched a satellite into the earth’s orbit, state television reported, in a feat that is likely to raise concerns among those who fear Iran’s intentions and nuclear development program.