Feeds

We used to be afraid of comets, now it's their turn

What's a little hyperbole between friends?

  • alert
  • submit to reddit

Intelligent flash storage arrays

When NASA's Deep Impact probe hits the comet Tempel-1 on 4 July, there are several possible outcomes.

The impactor will be released around 24 hours ahead of its scheduled crash. On Monday morning at 04:52 (GMT) the fly-by craft will make a minor course correction to make sure it misses the comet's nucleus.

The impactor will make course corrections too, at 90 minujtes, 30 minutes and 12.5 minutes before impact. The probe is scheduled to hit at 06:52, and pictures from the fly by craft should arrive at NASA's HQ 7.5 minutes later.

The most likely result of the crash is that the impact of the 360kg probe will form a gravity-controlled crater around 20-30m deep, and around the size of a football stadium. It might also form a muc small compression-crater, which would result in the release of far less material.

However, there are some other scenarios that are possible, although far less likely. The probe could split, or shatter the nucleus; or it could even pass straight through the middle.

Dr. Andrew Coates from the Mullard Space Science Laboratory at UCL, speaking today at the British Festival of Space 2005, in Birmingham, said that the kind of collision really doesn't matter.

"We know so little about comets that almost anything we learn from the collision will be useful," he said.

"What is definite is that material will be evolved from the comet. In 15 minutes, approximately one month's worth of gas will be released from Tempel-1."

There is, however, no danger that the comet will be sent off course and hurtling towards Earth. Coates explains that the collision is the equivalent of a mosquito ramming into a Boeing 767 plane, so although it will be a powerful impact, it will have little or no effect on the path of the comet.

"We used to be afraid of comets. The dinosaurs should have been afraid of comets. Now it is the comet's turn to be afraid," Coates said. ®

Providing a secure and efficient Helpdesk

More from The Register

next story
GRAV WAVE DRAMA: 'Big Bang echo' may have been grit on the scanner – boffins
Exit Planet Dust on faster-than-light expansion of universe
SpaceX Dragon cargo truck flies 3D printer to ISS: Clawdown in 3, 2...
Craft berths at space station with supplies, experiments, toys
That glass of water you just drank? It was OLDER than the SUN
One MEELLION years older. Some of it anyway
NASA rover Curiosity drills HOLE in MARS 'GOLF COURSE'
Joins 'traffic light' and perfect stony sphere on the Red Planet
Big dinosaur wowed females with its ENORMOUS HOOTER
That's right, Doris, I've got biggest snout in the prehistoric world
Japanese volcano eruption reportedly leaves 31 people presumed dead
Hopes fade of finding survivors on Mount Ontake
Canberra drone team dances a samba in Outback Challenge
CSIRO's 'missing bushwalker' found and watered
prev story

Whitepapers

A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.