The human race shouldn't have all its eggs in one basket, or on one planet.
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But when more than one planet is tugging at a star, deciphering the meaning of the wobble is complicated.
Either it's going to become multiplanetary, or it's going to be confined to one planet until some eventual extinction event.
External considering makes us aware that, in the end, we are all one planet, one living being, and one Life.
You can listen to One Planet, or download it as a podcast, by visiting the BBC World Service's One Planet website .
Plaid Cymru AM Dafydd Elis-Thomas commended the work of the previous coalition government between Labour and Plaid Cymru on its One Wales, One Planet sustainable development commitments.
The Wall Street Journal reported last Thursday that astronomers are now confident that every star in the Milky Way galaxy is sun to at least one planet.
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Two further sine waves emerged in 2002, corresponding to one planet that has the mass of Saturn and is also orbiting more closely than Mercury, and another with four times the mass of Jupiter that is located in what would be Jupiter's orbit.
One way they could have got there is if multiple planets have interacted in a gravitational "billiards game", in which one planet might have been flung in towards the parent star (sometimes to be swallowed whole), while another might have been thrown into an eccentric orbit, or perhaps even ejected from the system altogether.
But seeing them both in the same system makes it far more likely that the star system used to have at least one more planet than it does now.
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Astronomers said Wednesday that each of the 100 billion stars in the Milky Way probably has at least one companion planet, on average, adding credence to the notion that planets are as common in the cosmos as grains of sand on the beach.
When the fate of our lands and waters has been cast into doubt, they have taken the long view that as Americans and as inhabitants of this one small planet, it is up to us to preserve our national heritage for our children, grandchildren, and for the generations to come.
WHITEHOUSE: Presidential Proclamation -- National Park Week, 2012
As one of Digital Planet's regular contributors, I hope some of them will add me as a friend on one of the social sites.
If and when Facebook decides to go public, Zuckerberg will become one of the richest men on the planet, and one of the youngest billionaires.
Mystics, too, have flocked to the volcano, claiming it as one of the planet's seven sources of spiritual energy.
It's biochemically impossible to dislike San Francisco, one of the planet's finest towns.
Oceans are considered to be one of the planet major players in the global carbon cycle, but the carbon uptake in the region where the eruption occurred has limited capacity.
As Pacquiao has ascended into one of the planet's most compelling athletes, so has the reputation of the 51-year-old Roach, Pac-man's soft-spoken engineer in the corner, counseling wisely behind black-rimmed eyeglasses.
Yes, there is a magical promise to people, this year is the turn of a natural voice recognition system in Siri, but Apple are here to sell everyone on the planet one of their phones.
The extra-solar planet is one of a mere handful detected using a novel technique called microlensing.
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Luckily, there is no known possibility of one slamming into the planet.
They've provided scientists with data to back up their theories about whether Mars was once a wetter, warmer planet, one that could have harbored life.
The number one place on the planet for marketing spend is Google Adwords, and make no mistake about it, this is an increasingly finite resource.
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"Everything that we've discovered in the last few years tells us that where we find one small, rocky planet there are likely to be others, " he told BBC News.
The intervening weeks will be spent in a manoeuvre called aerobraking, which involves using the air-resistance of the thin Martian atmosphere to change the elliptical initial orbit into a circular one from which the planet's surface can be examined in detail.
The Nazis believed there was room on the planet for only one ideology and one race.
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