Solar System
Latest about Solar System
![An artist's impression of the solar system](https://cdn.mos.cms.futurecdn.net/RHiYURLf7bwv2TrTshqpic-320-80.jpg)
Where does the solar system end?
By Harry Baker published
The location of the solar system's outer boundary is a point of contention among astronomers. There are three possible candidates, which "all have merit." But which one is best?
![The Sun, followed by Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune & Pluto.](https://cdn.mos.cms.futurecdn.net/B8ypgZ9gvzWJmRbu3nRSGa-320-80.jpg)
Have all 8 planets ever aligned?
By Charles Q. Choi published
The solar system's eight planets will never truly be in a straight line, but they can get close to it.
![Image of one side of the commerative plate which is a silver-color, against a black background. The plate appears to have lots of symbolic markings across it and is the shape of a right-angled triangle](https://cdn.mos.cms.futurecdn.net/QR6csAkvs5i3KdH8mezkc5-320-80.png)
NASA unveils cryptic message from Earth to be sent to Jupiter's icy ocean moon Europa
By Emily Cooke published
From a poem written by a U.S. Poet Laureate to millions of stenciled names, NASA's Clipper spacecraft's trip to Europa will be marked with a human touch.
![Illustration of the Red Planet aka Mars against a black background](https://cdn.mos.cms.futurecdn.net/gyvJwtr8NxyGMMJ9T5Z5o3-320-80.jpg)
Every 2.4 million years, Mars tugs on Earth so hard it changes the ocean floor
By Emily Cooke published
A new geological study suggests that Mars' gravitational field pulls the Earth closer to the sun over cycles lasting millions of years, warming our climate.
![Hiroshima, Japan, after the atomic bomb attack of 8 August 1945 showing the Genbaku Dome.](https://cdn.mos.cms.futurecdn.net/39VkrPhVmYSksQxXpDxsVB-320-80.jpg)
Hiroshima fallout may offer a glimpse of the early solar system
By Nathaniel Scharping, Eos.org published
Bits of glass called Hiroshimaites may have formed by processes similar to those that formed the sun and the planets.
![A star in the Lizard constellation appears to be dragging a trail of stardust behind it.](https://cdn.mos.cms.futurecdn.net/YoSyESeFasNoYZmWq3VevP-320-80.jpg)
Passing stars may have changed Earth's orbit and climate, study finds
By Abha Jain published
Passing stars may have altered Earth's orbit, and its climate, many times throughout cosmic history. New research digs into what that means when it comes to understanding our planet's past.
![An artists intepretation of Planet Nine shows a large dark planet with the sun in the distance](https://cdn.mos.cms.futurecdn.net/JpgxRtvMNUm6hVH8Wom2NS-320-80.jpg)
Astronomers narrow down where 'Planet Nine' could be hiding by playing massive game of 'connect the dots'
By Harry Baker published
The researchers who originally proposed the Planet Nine hypothesis have narrowed down where the giant elusive world might be hiding, after carrying out an exhaustive sweep of the theoretical planet's orbital pathway.
![An illustration of Neptune and some of its moons with Uranus and the sun in the background](https://cdn.mos.cms.futurecdn.net/7MaFVkD87Y67PK23Gy6wMj-320-80.jpg)
3 new moons discovered around Uranus and Neptune will be named after Shakespeare characters and Greek goddesses
By Harry Baker published
The International Astronomical Union has confirmed the existence of three currently unnamed moons — one around Uranus and two orbiting Neptune.
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