comets

Does Jupiter protect Earth from asteroids and comets?

Jupiter has often been thought to protect the inner Solar System from asteroids and comets, but new research has shown that the giant planet may actually increase the risk of an impact.




comets

'Crumb trails' of meteoroids could reveal potentially dangerous comets years before they reach Earth

Potentially dangerous comets could be spotted many years in advance by following the meteoroid trails they leave near Earth, new research shows.




comets

Trajectory of ‘Oumuamua and wandering Sun, alien asteroids and comets detected by SOHO

The apparent non‑gravitational acceleration the extra-solar-system ‘Oumuamua exhibits is puzzling. We find that when the position and velocity of the Sun is correctly set in computing the predicted orbit, ‘Oumuamua’s trajectory can be explained with gravity and we have reproduced the unexpected gap by computation. We also propose to search for new extra-solar-system high speed...




comets

Two Comets Could Be Visible to the Naked Eye This Fall. Here's How to Get the Best View

While expectations are high for some special sightings, experts warn that comets are notoriously fickle and unpredictable




comets

Super sensitive telescope will detect “killer” asteroids and comets on collision course with Earth

This innovative facility will be at the front line of Earth defense by searching for "killer" asteroids and comets. It will map large portions of the sky nightly, making it an efficient sleuth for not just asteroids but also supernovae and other variable objects.

The post Super sensitive telescope will detect “killer” asteroids and comets on collision course with Earth appeared first on Smithsonian Insider.




comets

Frigid water cloud may be source of water delivered to dry planets by comets

For the first time, astronomers have detected around a burgeoning solar system a sprawling cloud of water vapor that’s cold enough to form comets, which could eventually deliver oceans to dry planets.

The post Frigid water cloud may be source of water delivered to dry planets by comets appeared first on Smithsonian Insider.




comets

Methanol reveals comets forming in distant solar system

Astronomers announced today that they have found the organic molecule methyl alcohol, or methanol, in the TW Hydrae protoplanetary disk. This is the first such […]

The post Methanol reveals comets forming in distant solar system appeared first on Smithsonian Insider.




comets

Astronomers detect comets transiting distant stars

There are currently more than 3,500 confirmed known exoplanets thanks to the remarkable sensitivity of the Kepler spacecraft and to technological advances in space and […]

The post Astronomers detect comets transiting distant stars appeared first on Smithsonian Insider.



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comets

How to see Mercury and 2 comets in the pre-dawn sky this week

This week in the hour before sunrise early morning stargazers will get a double treat: the planet Mercury and two special comets.




comets

Comets Prevent Ether from Accumulating in Space

Originally published in January 1859

-- Read more on ScientificAmerican.com




comets

Comets in the 21st century: a personal guide to experiencing the next great comet! / Daniel C. Boice, Thomas Hockey ; with a foreword by Walter F. Huebner

Online Resource




comets

Cosmic impact: understanding the threat to earth from asteroids and comets / Andrew May

Hayden Library - QB651.M39 2019




comets

When the Earth had two moons: cannibal planets, icy giants, dirty comets, dreadful orbits, and the origins of the night sky / Erik Asphaug

Dewey Library - QB603.O74 A86 2019




comets

How comets change seasonally and a news roundup

Myrtha Hässig discusses variability and heterogeneity of the coma of comet 67P as part of Science's special issue on the Rosetta spacecraft. Meghna Sachdev discusses daily news stories. Hosted by Susanne Bard. [Img: European Space Agency/Rosetta/NAVCAM]




comets

Finding comets' hidden nitrogen

Ammonium salts may serve as nitrogen reservoirs on the icy bodies, suggesting a common origin for comets and the sun




comets

Finding comets' hidden nitrogen

Ammonium salts may serve as nitrogen reservoirs on the icy bodies, suggesting a common origin for comets and the sun