But then I went on to envisage, at least in my own mind, a time when large fossil fuel generators had all closed own — mainly in order to avoid ruining our one and
only habitable planet — and that the 24/7 power supply would be a mix of Solar PV, solar thermal (eg CSP), wind and the lesser sources such as hydro, tidal, geothermal etc having taken over the complete electricity supply — especially since Australia doesn't have, and is almost certain never to have, nuclear fission plants.
Or to know that Earth was truly unique in that it was
the only habitable planet would affect how many people view their place in the universe.
Not exact matches
«You have basically stated that we are the
only inhabitable
planet, to say that is completely dishonest» = > That is news to me as I am not aware of such «
habitable»
planet.
Our Earth is also the
only real
habitable planet in our solar system.
Well, three of them are in this
habitable zone, and that's kind of like Venus, Earth, and Mars are in the
habitable zone here in our solar system, of course
only one of those
planets is
habitable, ours.
The answers will not
only help explain how Earth became an ideal place for incubating life; they will also tell a lot about the odds of finding similar
habitable planets around other stars.
Ultraviolet radiation could strip not
only the water vapor from a
habitable M dwarf
planet, but also the oxygen and nitrogen in just tens of millions of years, astrophysicist Vladimir Airapetian of NASA's Goddard Space Flight Center in Greenbelt, Md., and colleagues suggested in the February 10 Astrophysical Journal Letters.
«This is
only one
planet, and we don't yet know whether it is actually
habitable or not, but it still is an extremely big deal because it will rapidly push the field into new frontiers,» says Olivier Guyon, a
planet - hunting astronomer at the University of Arizona.
«Of course, much of evolution is down to luck, so this isn't concrete, but we know that complex, intelligent species like humans could not emerge after
only a few million years because it took us 75 per cent of the entire
habitable lifetime of this
planet to evolve.
The new discovery, Kepler - 452b, fires the
planet hunter's imagination because it is the most similar to the Earth - sun system found yet: a
planet at the right temperature within the
habitable zone, and
only about one - and - a-half times the diameter of Earth, circling a star very much like our own sun.
He adds that the search could be optimised by visiting
only those stars that harbour
habitable planets, which could be identified by
planet - finding missions such as NASA's Terrestrial Planet F
planet - finding missions such as NASA's Terrestrial
Planet F
Planet Finder.
The prospective
planet would orbit in searingly close proximity to its star, at roughly 1/50 the distance between the sun and Earth, the
only definitely
habitable world we know of.
«Results from the three main techniques of
planet detection (radial velocity, transit and microlensing techniques) are rapidly converging to a common result: Not
only are
planets common in the galaxy, but there are more small
planets than large ones,» said Stephen Kane, of NASA's Exoplanet Science Institute at the California Institute of Technology, Pasadena, Calif. «This is encouraging news for investigations into
habitable planets.»
Since Omega Centauri is thought to be Kapteyn's star place of origin, scientists estimate that its
planets must be approximately 11.5 to 12 billion years old, thus making Kapteyn b not
only the oldest known possibly
habitable exoplanet to date, but, along with Kapteyn c, the first that might have originated from another galaxy, outside of the Milky Way.
«What this means is, when you look up at the thousands of stars in the night sky, the nearest sun - like star with an Earth - size
planet in its
habitable zone is probably
only 12 light years away and can be seen with the naked eye.
In particular, I will focus on
planets on eccentric orbits, not
only because typical exoplanetary systems have been found to contain these, but also because their interactions with debris disks theoretically facilitates the transport of icy bodies within the
habitable zone of planetary systems.
Petigura said, «When you look up at the thousands of stars in the night sky, the nearest sun - like star with an Earth - size
planet in its
habitable zone is probably
only 12 light years away and can be seen with the naked eye.
Based on their observations of 42,000 stars, the researchers found 603 orbiting
planets, but
only 10 were Earth - like in size, roughly one to two times the diameter of our
planet, and potentially
habitable.
It's great to say that the universe is 14 billion years old, or that Voyager 1 is now flying towards one of the nearest
habitable planets, but it's
only when we put things in human terms do we truly appreciate the scale of the universe.
When looking for
habitable worlds, it helps to find a star that has similar qualities to our sun as it's the
only star known to have a
planet orbiting that's packed with life.
We are entering a scientific era in which we have the capability to detect not
only giant
planets the size of Jupiter, but Earth - sized
planets in the
habitable zones of their solar systems, the locations where liquid water can exist.
«
Planet e is in the
habitable zone
only if we make very generous assumptions.
Planet f initially looks more promising, but modeling the evolution of the star makes it seem probable that it has
only moved into the
habitable zone recently as Tau Ceti has gotten more luminous over the course of its life,» explains astrophysicist Michael Pagano, ASU postdoctoral researcher and lead author of the paper appearing in the Astrophysical Journal.
The system is particularly exciting, not
only because of its proximity to our
planet, but because it has three
planets within the
habitable zone, where...
Previously discussed in a November 24, 2011 pre-print, the astronomers «surveyed a carefully chosen sample of 102 red dwarf stars in the southern skies over a six - year period» and found a «total of nine super-Earths (
planets with masses between one and ten times that of Earth),» of which two orbiting within the
habitable zones of Gliese 581 and Gliese 667 C. By combining all the radial - velocity data of red dwarf stars (including those without undetected
planets) and examining the fraction of confirmed
planets that was found, the astronomers were able to estimate the probable distribution of different types of
planets around red dwarfs: for example,
only 12 percent of such stars within 30 light - years may have giant
planets with masses between 100 and 1,000 times that of the Earth (ESO news release; Bonfils et al, 2011; and Delfosse et al, 2011).
Of the 135
planets confirmed so far,
only a few are thought to be in the
habitable (or «Goldilocks») zone, where conditions on the
planet's surface can support surface liquid water.
With
only 15
habitable zone rocky
planets to work with, the authors caution that their results may be dominated by the detection biases of the radial velocity and transit surveys.
Since our telescopes and detection programs have
only begun being sensitive enough to find a small
planet in the
habitable zone, it is possible the ones in this sample are not truly representative of the whole
planet population, but are just the easiest ones to find.
In fact, we have
only a superficial notion of where to look for
habitable planets.
However, our exoplanet surveys have
only just begun to detect enough
habitable zone
planets to attempt this type of analysis, and our understanding of stellar metallicity and
planet formation is still too limited to make any firm conclusions.
Of the 60
planets examined
only 15 of them fall within the
habitable zone.
Astrobiology Roadmap Goal 1:
Habitable planets Astrobiology Roadmap Goal 6: Life's future on Earth Studying the structure of the Solar System is important for astrobiologists because it can help them determine how our system is able to support the
only inhabited
planet yet known - the Earth.
Alpha Prime is the
only other
habitable planet mankind has discovered.
Interim Captain Billy Crudup orders that they land on the unfamiliar but seemingly
habitable planet, and those 20 minutes of atmospheric research are reason enough for them to not
only land but to go out exploring sans helmets.
When the Earth begins cooling unexpectedly, humanity is left with
only a few degrees of
habitable latitude along the
planet's equator.
Biologist Olaus Murie stated that the Arctic Refuge should be preserved «as a help to us for our understanding of the natural processes in the universe... We have
only begun to understand the basic energies which through the ages have made this
planet habitable.
«
Only planets in the first category (Earth, Mars, Venus) might be
habitable now or might have been at some time in their past, so those are the ones we are interested in for the NExSS project.»