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It’s the End of the World as We Know It: Biosignatures from the Dying Earth

It’s the End of the World as We Know It: Biosignatures from the Dying Earth

by Sukrit Ranjan | Oct 23, 2013 | Daily Paper Summaries

This paper asks what the biosphere of the Earth will look like billions of years from now, when the era of life is ending. What biosignatures might we detect from a dying planet?

Reassuring Chicken Little: Why Satellites Are Not Falling Out of The Sky

Reassuring Chicken Little: Why Satellites Are Not Falling Out of The Sky

by Sukrit Ranjan | Sep 25, 2013 | Daily Paper Summaries

This paper seeks to provide a theoretical explanation for why gravitational perturbations do not disrupt the Keplerian orbits of Earth’s satellites.

New Insight Into A Potentially Evaporating Planet

New Insight Into A Potentially Evaporating Planet

by Sukrit Ranjan | Aug 16, 2013 | Daily Paper Summaries

There is a small planet candidate, likely rocky, that looks like it’s being vaporized. The authors of this paper show evidence that this evaporation might be related to stellar activity, not just the planet’s proximity to its star.

The Influence of Ice and Snow on Habitability (or, On the Habitability of Hoth)

The Influence of Ice and Snow on Habitability (or, On the Habitability of Hoth)

by Sukrit Ranjan | Aug 13, 2013 | Daily Paper Summaries

This article uses theoretical modeling to estimate the influence of ice and snow on the habitability of extrasolar planets. This work differentiates itself from past efforts by including the influence of the atmosphere, and by considering planets orbiting M-dwarfs in addition to Sun-like stars.

Studying Space Water: Measurements of the D/H Ratio in Comet 45P

Studying Space Water: Measurements of the D/H Ratio in Comet 45P

by Sukrit Ranjan | Aug 1, 2013 | Daily Paper Summaries

This paper describes the measurement of the deuterium-to-hydrogen (D/H) ratio in a Jupiter-family comet, 45P. This ratio is related to the formation history of the comet and helps inform our understanding of the formation of our solar system.

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