Quotes About Astrobiology

Astrobiology is the science of life in the universe. It's an attempt to scientifically deal with the question of whether or not we're alone in the universe, looking at the past of life, the present of life, and the future of life. It's an interdisciplinary study incorporating astronomy, biology, and the Earth sciences.

Our sun is one of a 100 billion stars in our galaxy. Our galaxy is one of billions of galaxies populating the universe. It would be the height of presumption to think that we are the only living thing in that enormous immensity.

I'm an astrobiologist, and I come from a planetary science background, so in a very broad sense, I study the evolution of planetary environments.

May it not be that the brighter stars are like our Sun, the upholding and energizing centers of systems of living beings?

Stars, of course, are too hot to support life, so wherever life might exist in the universe, it has to be on planets or moons that are warmed, but not incinerated, by the stars they travel around.

Astrobiology is a great point of contact for science outreach. The public is naturally interested in extra-terrestrial life. Astrobiology provides an accessible point of access that leads to deeper questions.

The discovery of any kind of life [in Space] at all would be a tremendous watershed moment in biology, as well as all of science.

For me, science is already fantastical enough. Unlocking the secrets of nature with fundamental physics or cosmology or astrobiology leads you into a wonderland compared with which beliefs in things like alien abductions pale into insignificance.

Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying

Certainly for me, as an astrobiologist, science fiction has played an important role. One of the quandaries of our field is that we are trying to study and search for something - life - that we can't define in a rigorous way. We only have one example of a biosphere, so we can't really give a good definition.

Where there's water on Earth, you find life as we know it. So if you find water somewhere else, it becomes a remarkable draw to look closer to see if life of any kind is there, even if it's bacterial, which would be extraordinary for the field of biology.

Rare Earth: Why Complex Life Is Uncommon in the Universe,

I think Pluto has to be considered among the places in the solar system that are possible homes for life.

Astrobiologists now believe that the existence of life throughout the universe requires: 1. a source of energy; 2. a type of atom that allows complex structures to exist; 3. a liquid solvent in which molecules can float and interact; and 4. sufficient time for life to arise and to evolve.

Sciences are being unified by the search for life in the universe.

The question we ask is - if there is life on other planets, should we expect it to be based on the same molecules, i.e. be universal - or should we expect it to depend on the local conditions, i.e. on the planet's geochemistry. So to find out, we try experiments on biomolecules, starting with such geochemistry conditions.

I'm so biased to this issue of the origins of life and the limits of life.

Mars still remains the astrobiology community's number one choice for 'nearest rock with life,' but there are many researchers who argue that the moons of Jupiter are better bets. In particular, Europa, Ganymede, and Callisto are all thought to hide vast oceans of liquid water beneath their icy, outer skins.

It's one of the big mysteries about Venus: How did it get so different from Earth when it seems likely to have started so similarly? The question becomes richer when you consider astrobiology, the possibility that Venus and Earth were very similar during the time of the origin of life on Earth.

I intend to apply the perspective of astrobiology, which is a deep-time way of looking at life on Earth, towards the question of the Anthropocene. What does the human phenomenon on Earth look like viewed from an interplanetary perspective?

Sometimes I think our presence here is due to a cosmic blunder, that we were meant for another planet altogether, with other arrangements, and other laws, and other, grimmer skies. I try to imagine it, our true place, off on the far side of the galaxy, whirling and whirling. And the ones who were meant for here, are they out there, baffled and homesick, like us? No, they would have become extinct long ago. How could they survive, these gentle earthlings, in a world that was made to contain us.

Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.

For me, science is already fantastical enough. Unlocking the secrets of nature with fundamental physics or cosmology or astrobiology leads you into a wonderland compared with which beliefs in things like alien abductions pale into insignificance.