Sentences with phrase «planet at some time in the past»

Or maybe it's dimming because it devoured a planet at some time in the past.

Not exact matches

In the past, researchers have described that the tilt of a planet's axis plays a key role in the climate cycles of a planet, assuring it's not too hot or too cold at any one timIn the past, researchers have described that the tilt of a planet's axis plays a key role in the climate cycles of a planet, assuring it's not too hot or too cold at any one timin the climate cycles of a planet, assuring it's not too hot or too cold at any one time.

There have only been three coldhouse periods (i.e. with ice at the poles) in the past 550 million years (the time that multi-cell animal life has been thriving on the planet) and we are in the third one now.

«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.»

The emergence of exoplanet research, spurred by the breath - taking discovery of so many new planets in the past decade, is at once tremendously exciting and at the same time unbelievably challenging, given the difficulty in detecting and characterizing these planets from so great a distance.»

The fundamental hypothesis is that at some time in the past and over some unspecified time - averaging period that on a whole - planet basis radiative energy transport attained a state of equilibrium; out - going energy = in - coming energy.

When global warming has happened at various times in the past two million years, it has taken the planet about 5,000 years to warm 5 degrees.