Welcome to Sott.net
Wed, 30 Sep 2020
The World for People who Think

Comets

Ambulance

Look Up! Comet Holmes Bigger Than The Sun

Formerly, the Sun was the largest object in the Solar System. Now, comet 17P/Holmes holds that distinction.

Comment: The same image is available from the University of Hawaii as a 300 dpi tif file.


Telescope

Comets: The Loose Thread

Spacecraft have now visited four comets. What they found contradicts what was expected and falsifies accepted comet theory. But that theory is woven with every other astronomical theory into a cosmology that defines the universe as we know it. The fall of comet theory will inevitably bring us a new and different universe.

©NASA/JPL/Malin Space Science Systems
Comet Wild 2 is shown in close-up above. Beside it is a microscopic view of an EDM (electrical discharge machined) surface. Note the flat-floored depressions with steep scalloped walls and terracing. The small white spots on the comet can then be reasonably identified as the active cathode arcs that produce the cometary jets.

Telescope

"Holming" in on a really bright comet

Stargazers will be in seventh heaven when one of the most spectacular sights in the night sky becomes visible above Paisley.

And, to make the outlook even brighter, Buddies won't even need binoculars or telescopes to identify the celestial wanderer.

They'll see it all with the naked eye.

©Sky and Telescope

Star

Giant comet awes UH scientists



©University of Hawaii
A comparison of Comet Holmes, the sun and Saturn (inset) is shown in this image from the University of Hawaii.

Once a faint, obscure comet, 17P/Holmes has eclipsed the sun as the largest object in the solar system and it's still growing, Hawaii astronomers say.

The spectacular comet has dazzled astronomers since it exploded Oct. 24 from a tiny nucleus of ice and rock about 2.2 miles in diameter.

Star

Is Comet 17P Holmes losing its tail?

"Is Comet 17P/Holmes losing its tail?" asks Italian astronomer Paolo Berardi. "Last night I recorded an image showing a big disconnection event that was not present on Nov 8th."

©Paolo Berardi

Telescope

Did a collision cause comet's mysterious outburst?

Comet 17P/Holmes has certainly given sky-watchers - backyard and professional astronomers alike - a thrilling chance to see a cometary outburst on a grand scale. After we posted my story about on-going speculation about what could have caused this outburst (and the one 115 years ago), many readers posted comments related to two questions: Could this have been triggered by a collision with an object in the main asteroid belt? And why can't we see more of a tail on this comet?

©Pic du Midi Observatory/Francois Colas/Jean Lecacheux/Boris Baillard
Holmes

Star

Comet Draws Scientific, Amateur Interest



©Unknown
Comet Holmes is seen among the stars of the constellation Perseus in the North-Eastern sky.

KNOXVILLE, Tenn. - A comet that unexpectedly brightened in the last couple of weeks and is now visible to the naked eye is attracting professional and amateur interest.

Telescope

More on Holmes: Comet phenomenon is spotted in UK

A Devon astronomer was able to track the unexpected brightness of a comet with a telescope in the Canary Islands.

©n/a
The earth in relation to the comet is 244 million km (151 614 570 miles) away

Star

Planets, meteors and comets mean plenty to see in November's sky

Though the nights are definitely chillier now, there's much to see in the night sky worth getting out for, especially this month.

Dress warmly and head for a dark site away from city lights and enjoy the special treats on display for those with the fortitude to venture forth.

The show starts just after sunset, with Jupiter shining brightly low in the southwest sky. You'll have to be quick to spot Jupiter's four largest moons - Io, Europa, Callisto and Ganymede - as Jupiter will follow the sun below the horizon soon after darkness falls. On Nov. 12, look for the slender, three-day old crescent moon just to the lower left of Jupiter.

Telescope

Comet Holmes explodes in evening sky, now rivals Sun in size

The first literate humans, living in Mesopotamian cities like Ur and Erech more than 5,000 years ago, seemed to believe that comets caused bad things to happen or, at the very least, they foretold that bad things would happen. Either way, they regarded a new comet in the evening sky as a portent of some future disaster.