An artist’s impression of Kepler-22b, a planet known to comfortably circle in the habitable zone of a sun-like star. It is the first planet that NASA’s Kepler mission has confirmed to orbit in a star’s habitable zone - the region around a star where liquid water, a requirement for life on Earth, could persist.
Life could exist in another solar system in a different part our galaxy. Or in another galaxy far away. We don't have the perfect technology yet to study such far away places but we're still trying.
Artist’s impression of Proxima b, a planet orbiting the star Proxima Centauri within the closest known star system outside of our solar system.
Using AI to search for ET might help us find things we couldn't even imagine we should look for, but to succeed we also have think critically about how we create and use that technology.
Illustration of a gamma ray burst in space.
New research may help us to look for messages from alien civilisations.
An artist’s impression of `Oumuamua, assuming it’s a rock.
Scientists looking for signs of alien life from the mystery object passing through our Solar system say they've found nothing "so far".
The ALMA telescope is searching.
Astronomers in Puerto Rico have picked up signal from a faint star that's not like anything they've seen before.
The discovery of the year was the first detection of gravitational waves.
Colliding black holes to exploding spacecraft, 2016 was an incredible year for astrophysics.
Mysterious radiation that appears to come from star HD 164595 is more likely to have a terrestrial origin.
Some argue that it would be impossible to understand an alien language, as it wouldn't have the same grammar as humans use. But others are more optimistic.
Artist’s rendition of one of the billions of rocky exoplanets in our galaxy.
Did life once exist on its surface?
Complex life may be rare in the universe because most planets become either too hot or too cold before life has a chance to get a foothold. This might explain why we have yet to bump into E.T.
ESO/José Francisco Salgado (josefrancisco.org)
In a world of blogs, twitter and open data, scientists need to think again about how they'd communicate a discovery of alien life.
A highlight of 2015 was the number of weird and wonderful exoplanets that were found.
From a flyby of Pluto to the search for extrasolar planets and gravitational waves, 2015 was a monumental year for space news.
The light shining through an exoplanet’s atmosphere can give us a hint of whether the planet supports life.
NASA, ESA, and G. Bacon (STScI)
A hint of oxygen and a whiff of methane in a distant exoplanet's atmosphere may be the first evidence we discover of alien life.
Scientists can’t explain strange flickering from distant star.
The chance that Kepler has spotted construction of a Dyson sphere are very low but it could also be the ruins of such a structure.
Is this what we’re seeing around KIC 8462852 - a colossal megastructure built by alien intelligence? Probably not. The reality might be even more interesting.
There's a lot of speculation about a star behaving strangely in our galaxy. But even if it's not evidence of alien intelligence, it's sure to be an amazing discovery.
The discovery of Kepler-452b raises questions that go to the heart of religion.
NASA/AAP/ Artist's impression of Kepler-452b.
Kepler-452b's discovery last week has raised the perennial question: are we alone in the universe? While the find's scientific import is huge, it also poses questions that go to the heart of religion.
What kind of creatures might we find populating the cosmos?
Given Earth is our sole example of life in the universe, it's hard to know what we're looking for elsewhere in the cosmos.
Stop calling all the time. Ever heard of the three-day rule?
Simple mathematics suggests that if there are aliens out there, they should have reached us by now. So is it really worthwhile trying to communicate with them?
What secrets will space reveal?
Why the Breakthrough Listen project is a step in the right direction in our hunt for life beyond Earth.
The 64-metre Parkes Radio telescope will be instrumental in the search for extraterrestrial intelligence.
The Parkes radio telescope is part of the US$100 million search for life elsewhere in the universe, but the investment will also benefit other space research at The Dish.
We come in peace.
The Conversation organised a public question-and-answer session on Reddit in which Seth Shostak, senior astronomer at the SETI Institute, explained why searching for intelligent life is so important and…