Alien life could be found in solar systems where to stars have been pushed together, according to new research.
The early life of planetary systems can often be difficult and dramatic: young planets orbit around suns that are found in clusters of stars that often collide with each other violently. Such dramatic moments have been thought to be difficult for life, since they are so harsh and violent.
It has meant that research has largely focused on planets and potential life around stars that are similar to our own, since we have been biased to presume that any other solar system that has aliens inside of it is likely to look like ours. Virtually none of those “solar twins” – stars that look like our own – have actually been found to exist.
But new research from the University of Sheffield suggests this period of difficulty could be positive in at least one way. Those difficult times when stars form in binaries could improve the chances of allowing the planets around them to be the right temperature, sitting in the habitable zone where liquid water can exist and life could flourish.
When they encounter a third star, a binary pair of stars might be pushed together. That in turn could expand the habitable zone, making life more possible.
1/30 Cassiopeia A c
A false colour image of Cassiopeia A comprised with data from the Spitzer and Hubble Space Telescopes and the Chandra X-Ray observatory
Nasa
2/30 Nasa Celebrates 50 Years of Spacewalking
For 50 years, NASA has been “suiting up” for spacewalking. In this 1984 photograph of the first untethered spacewalk, NASA astronaut Bruce McCandless is in the midst of the first “field” tryout of a nitrogen-propelled backpack device called the Manned Maneuvering Unit (MMU)
3/30 The Soyuz TMA-15M rocket launch
The Soyuz TMA-15M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Monday, Nov. 24, 2014, carrying three new astronauts to the International Space Station. It also took caviar, ready for the satellite’s inhabitants to celebrate the holidays
Nasa
4/30 Earth from the ISS
From the International Space Station, Expedition 42 Flight Engineer Terry W. Virts took this photograph of the Gulf of Mexico and U.S. Gulf Coast at sunset
Nasa
5/30 Solar Flare
An image from Nasa’s Solar Dynamics Observatory (SDO) shows a 200,000 mile long solar filament ripping through the Sun’s corona in September 2013
Nasa
6/30 NuSTAR
X-rays stream off the sun in this image showing observations from by NASA’s Nuclear Spectroscopic Telescope Array, or NuSTAR, overlaid on a picture taken by NASA’s Solar Dynamics Observatory (SDO)
Nasa
7/30 Black Hole Friday
Nasa celebrated Black Friday by looking into space instead — sharing pictures of black holes
Nasa
8/30 Orion Capsule splashes down
The Orion capsule jetted off into space before heading back a few hours later — having proved that it can be used, one day, to carry humans to Mars
Nasa
9/30 A Hubble Cosmic Couple
The spectacular cosmic pairing of the star Hen 2-427 — more commonly known as WR 124 — and the nebula M1-67 which surrounds it
ESA/Hubble & NASA Acknowledgeme
10/30 Veil Nebula Supernova Remnant
Nasa’s Hubble Space Telescope has unveiled in stunning detail a small section of the Veil Nebula – expanding remains of a massive star that exploded about 8,000 years ago
11/30 Earth Observations From Gemini IV in 1965
This photograph of the Florida Straits and Grand Bahama Bank was taken during the Gemini IV mission during orbit no. 19 in 1965. The Gemini IV crew conducted scientific experiments, including photography of Earth’s weather and terrain, for the remainder of their four-day mission following Ed White’s historic spacewalk on June 3
12/30 Frosty slopes of Mars
This image of an area on the surface of Mars, approximately 1.5 by 3 kilometers in size, shows frosted gullies on a south-facing slope within a crater. The image was taken by Nasa’s HiRISE camera, which is mounted on its Mars Reconaissance Orbiter
Nasa
13/30 Yellowstone from space
NASA astronaut Reid Wiseman shared this image of Yellowstone via his twitter account
Nasa
14/30 Saturn
This near-infrared color image shows a specular reflection, or sunglint, off of a hydrocarbon lake named Kivu Lacus on Saturn’s moon Titan
Nasa
15/30 Worlds Apart
Although Mimas and Pandora, shown here, both orbit Saturn, they are very different moons. Pandora, “small” by moon standards (50 miles or 81 kilometers across) is elongated and irregular in shape. Mimas (246 miles or 396 kilometers across), a “medium-sized” moon, formed into a sphere due to self-gravity imposed by its higher mass
Nasa
16/30 Solar Flare
An X1.6 class solar flare flashes in the middle of the sun in this image taken 10 September, captured by NASA’s Solar Dynamics Observatory
Nasa
17/30 Large Magellanic Cloud galaxy
An image of the Large Magellanic Cloud galaxy seen in infrared light by the Herschel Space Observatory. Regions of space such as this are where new stars are born from a mixture of elements and cosmic dust
Nasa
18/30 Mars Rover Spirit
Nasa’s Mars Rover Spirit took the first picture from Spirit since problems with communications began a week earlier. The image shows the robotic arm extended to the rock called Adirondack
Nasa
19/30 Morning Aurora From the Space Station
Nasa astronaut Scott Kelly captured this photograph of the green lights of the aurora from the International Space Station
20/30 Launch of History – Making STS-41G Mission in 1984
The Space Shuttle Challenger launches from Florida at dawn. On this mission, Kathryn Sullivan became the first U.S. woman to perform a spacewalk and Marc Garneau became the first Canadian in space. The crew of seven was the largest to fly on a spacecraft at that time, and STS-41G was the first flight to include two female astronauts
21/30 A Fresh Perspective on an Extraordinary Cluster of Galaxies
Galaxy clusters are often described by superlatives. After all, they are huge conglomerations of galaxies, hot gas, and dark matter and represent the largest structures in the Universe held together by gravity
22/30 Hubble Sees a Galactic Sunflower
The arrangement of the spiral arms in the galaxy Messier 63, seen here in an image from the Nasa Hubble Space Telescope, recall the pattern at the center of a sunflower
ESA/Hubble & NASA
23/30 Pluto image
Four images from New Horizons’ Long Range Reconnaissance Imager (LORRI) were combined with colour data from the Ralph instrument to create this enhanced colour global view of Pluto
24/30 Fresh Crater Near Sirenum Fossae Region of Mars
The HiRISE camera aboard Nasa’s Mars Reconnaissance Orbiter acquired this closeup image of a “fresh” (on a geological scale, though quite old on a human scale) impact crater in the Sirenum Fossae region of Mars. This impact crater appears relatively recent as it has a sharp rim and well-preserved ejecta
25/30 Hubble Peers into the Most Crowded Place in the Milky Way
This Nasa Hubble Space Telescope image presents the Arches Cluster, the densest known star cluster in the Milky Way
NASA & ESA
26/30 An Astronaut’s View from Space
Nasa astronaut Reid Wiseman tweeted this photo from the International Space Station on 2 September 2014
27/30 Giant Landform on Mars
On Mars, we can observe four classes of sandy landforms formed by the wind, or aeolian bedforms: ripples, transverse aeolian ridges, dunes, and what are called “draa”
28/30 Expedition 39 Landing
A sokol suit helmet can be seen against the window of the Soyuz TMA-11M capsule shortly after the spacecraft landed with Expedition 39 Commander Koichi Wakata of the Japan Aerospace Exploration Agency (JAXA), Soyuz Commander Mikhail Tyurin of Roscosmos, and Flight Engineer Rick Mastracchio of NASA near the town of Zhezkazgan, Kazakhstan
(NASA/Bill Ingalls)
29/30 Jupiter’s Great Red Spot Viewed by Voyager I
Jupiter is the largest planet in the solar system and perhaps the most majestic. Vibrant bands of clouds carried by winds that can exceed 400 mph continuously circle the planet’s atmosphere
30/30 Chandra Observatory Sees a Heart in the Darkness
This Chandra X-Ray Observatory image of the young star cluster NGC 346 highlights a heart-shaped cloud of 8 million-degree Celsius gas in the central region
1/30 Cassiopeia A c
A false colour image of Cassiopeia A comprised with data from the Spitzer and Hubble Space Telescopes and the Chandra X-Ray observatory
Nasa
2/30 Nasa Celebrates 50 Years of Spacewalking
For 50 years, NASA has been “suiting up” for spacewalking. In this 1984 photograph of the first untethered spacewalk, NASA astronaut Bruce McCandless is in the midst of the first “field” tryout of a nitrogen-propelled backpack device called the Manned Maneuvering Unit (MMU)
3/30 The Soyuz TMA-15M rocket launch
The Soyuz TMA-15M rocket launches from the Baikonur Cosmodrome in Kazakhstan on Monday, Nov. 24, 2014, carrying three new astronauts to the International Space Station. It also took caviar, ready for the satellite’s inhabitants to celebrate the holidays
Nasa
4/30 Earth from the ISS
From the International Space Station, Expedition 42 Flight Engineer Terry W. Virts took this photograph of the Gulf of Mexico and U.S. Gulf Coast at sunset
Nasa
5/30 Solar Flare
An image from Nasa’s Solar Dynamics Observatory (SDO) shows a 200,000 mile long solar filament ripping through the Sun’s corona in September 2013
Nasa
6/30 NuSTAR
X-rays stream off the sun in this image showing observations from by NASA’s Nuclear Spectroscopic Telescope Array, or NuSTAR, overlaid on a picture taken by NASA’s Solar Dynamics Observatory (SDO)
Nasa
7/30 Black Hole Friday
Nasa celebrated Black Friday by looking into space instead — sharing pictures of black holes
Nasa
8/30 Orion Capsule splashes down
The Orion capsule jetted off into space before heading back a few hours later — having proved that it can be used, one day, to carry humans to Mars
Nasa
9/30 A Hubble Cosmic Couple
The spectacular cosmic pairing of the star Hen 2-427 — more commonly known as WR 124 — and the nebula M1-67 which surrounds it
ESA/Hubble & NASA Acknowledgeme
10/30 Veil Nebula Supernova Remnant
Nasa’s Hubble Space Telescope has unveiled in stunning detail a small section of the Veil Nebula – expanding remains of a massive star that exploded about 8,000 years ago
11/30 Earth Observations From Gemini IV in 1965
This photograph of the Florida Straits and Grand Bahama Bank was taken during the Gemini IV mission during orbit no. 19 in 1965. The Gemini IV crew conducted scientific experiments, including photography of Earth’s weather and terrain, for the remainder of their four-day mission following Ed White’s historic spacewalk on June 3
12/30 Frosty slopes of Mars
This image of an area on the surface of Mars, approximately 1.5 by 3 kilometers in size, shows frosted gullies on a south-facing slope within a crater. The image was taken by Nasa’s HiRISE camera, which is mounted on its Mars Reconaissance Orbiter
Nasa
13/30 Yellowstone from space
NASA astronaut Reid Wiseman shared this image of Yellowstone via his twitter account
Nasa
14/30 Saturn
This near-infrared color image shows a specular reflection, or sunglint, off of a hydrocarbon lake named Kivu Lacus on Saturn’s moon Titan
Nasa
15/30 Worlds Apart
Although Mimas and Pandora, shown here, both orbit Saturn, they are very different moons. Pandora, “small” by moon standards (50 miles or 81 kilometers across) is elongated and irregular in shape. Mimas (246 miles or 396 kilometers across), a “medium-sized” moon, formed into a sphere due to self-gravity imposed by its higher mass
Nasa
16/30 Solar Flare
An X1.6 class solar flare flashes in the middle of the sun in this image taken 10 September, captured by NASA’s Solar Dynamics Observatory
Nasa
17/30 Large Magellanic Cloud galaxy
An image of the Large Magellanic Cloud galaxy seen in infrared light by the Herschel Space Observatory. Regions of space such as this are where new stars are born from a mixture of elements and cosmic dust
Nasa
18/30 Mars Rover Spirit
Nasa’s Mars Rover Spirit took the first picture from Spirit since problems with communications began a week earlier. The image shows the robotic arm extended to the rock called Adirondack
Nasa
19/30 Morning Aurora From the Space Station
Nasa astronaut Scott Kelly captured this photograph of the green lights of the aurora from the International Space Station
20/30 Launch of History – Making STS-41G Mission in 1984
The Space Shuttle Challenger launches from Florida at dawn. On this mission, Kathryn Sullivan became the first U.S. woman to perform a spacewalk and Marc Garneau became the first Canadian in space. The crew of seven was the largest to fly on a spacecraft at that time, and STS-41G was the first flight to include two female astronauts
21/30 A Fresh Perspective on an Extraordinary Cluster of Galaxies
Galaxy clusters are often described by superlatives. After all, they are huge conglomerations of galaxies, hot gas, and dark matter and represent the largest structures in the Universe held together by gravity
22/30 Hubble Sees a Galactic Sunflower
The arrangement of the spiral arms in the galaxy Messier 63, seen here in an image from the Nasa Hubble Space Telescope, recall the pattern at the center of a sunflower
ESA/Hubble & NASA
23/30 Pluto image
Four images from New Horizons’ Long Range Reconnaissance Imager (LORRI) were combined with colour data from the Ralph instrument to create this enhanced colour global view of Pluto
24/30 Fresh Crater Near Sirenum Fossae Region of Mars
The HiRISE camera aboard Nasa’s Mars Reconnaissance Orbiter acquired this closeup image of a “fresh” (on a geological scale, though quite old on a human scale) impact crater in the Sirenum Fossae region of Mars. This impact crater appears relatively recent as it has a sharp rim and well-preserved ejecta
25/30 Hubble Peers into the Most Crowded Place in the Milky Way
This Nasa Hubble Space Telescope image presents the Arches Cluster, the densest known star cluster in the Milky Way
NASA & ESA
26/30 An Astronaut’s View from Space
Nasa astronaut Reid Wiseman tweeted this photo from the International Space Station on 2 September 2014
27/30 Giant Landform on Mars
On Mars, we can observe four classes of sandy landforms formed by the wind, or aeolian bedforms: ripples, transverse aeolian ridges, dunes, and what are called “draa”
28/30 Expedition 39 Landing
A sokol suit helmet can be seen against the window of the Soyuz TMA-11M capsule shortly after the spacecraft landed with Expedition 39 Commander Koichi Wakata of the Japan Aerospace Exploration Agency (JAXA), Soyuz Commander Mikhail Tyurin of Roscosmos, and Flight Engineer Rick Mastracchio of NASA near the town of Zhezkazgan, Kazakhstan
(NASA/Bill Ingalls)
29/30 Jupiter’s Great Red Spot Viewed by Voyager I
Jupiter is the largest planet in the solar system and perhaps the most majestic. Vibrant bands of clouds carried by winds that can exceed 400 mph continuously circle the planet’s atmosphere
30/30 Chandra Observatory Sees a Heart in the Darkness
This Chandra X-Ray Observatory image of the young star cluster NGC 346 highlights a heart-shaped cloud of 8 million-degree Celsius gas in the central region
The habitable zone is sometimes known as the Goldliocks zone: it is the distance from stars where the temperature is not too hot and not too cold. Those perfect conditions are thought to be necessary for life, since water will be able to be found and the complex molecules that can go on to become life can form.
Roughly a third of the star systems in our galaxy are thought to be made up of these binary pairs, and the chance of them being is higher when the stars are young.
In such systems, when the stars are far enough apart, the Goldilocks zone is set by the radiation coming out of the individual star. If the stars are close enough, the size of it increases, becuase the stars feel the warmth from each other and the planet is more likely to be in the right place, researchers Bethany Wootton and Richard Parker write.
By using computer simulations to understand how the stars might interact, they were able to understand how the encounters would affect the pairs of two stars. In a typical “stellar nursery”, where there would be 350 or so binaries, some 20 of them would be squeezed together in such a way as to expand their Goldilocks zone, and with it the chance of alien life.
In some cases those habitable zones even overlapped. That would make the chances of life even higher.
“Our model suggests that there are more binary systems where planets sit in Goldilocks zones than we thought, increasing the prospects for life,” says Wootton. “So those worlds beloved of science fiction writers – where two suns shine in their skies above alien life – look a lot more likely now.”
Now researchers hope to use more computer models and try and understand if the difficult moment such binary pairs exist in are better than the positives they might give.
What’s more, scientists will now be able to look towards these binary systems in the hope of seeing yet more clues about how habitable they are. While we are still some way off understanding whether these systems are actually able to support life, Parker said, the research could encourage more observation of places where they are actually occurring.
That does not necessarily mean that we have been looking in the wrong place, he said, but as we learn that it might be possible for stable solar systems to develop in places very different to our own, it is clear how little data we have on those systems. New research could further explore what is happening around those systems, and try and discover the kind of environments that might be found there.