Sedna - Cat Forum : Cat Discussion Forums
LinkBack Thread Tools
post #1 of 2 (permalink) Old 04-08-2004, 01:44 PM Thread Starter
Jr. Cat
Join Date: Feb 2004
Posts: 83
Send a message via AIM to HardRocker

Have you heard of the 10th planet in our solar system. Sedna was discovered a couple of months ago. I LOVE astronamy so I read about it all the time. Sedna was found behind Pluto and was the cause of Pluto's strange orbital path. By the way.....Did anyone hear about that black hole? The one that was recorded tearing up a nearby star. Scientists were able to record it on video using a Brazilian Telescope. Are there any other astronamy lovers here?
HardRocker is offline  
Sponsored Links
post #2 of 2 (permalink) Old 04-08-2004, 02:55 PM
Premier Cat

Jeanie's Avatar
Join Date: Jun 2003
Location: Pennsylvania
Posts: 30,252
Send a message via MSN to Jeanie
Diana , I like astronomy too. This is new to me, though, because I don't get any science magazines any more, and have not seen this on any of the educational channels. According to, it is probably too small to be considered a planet, and Pluto might not meet the requirements. Here's an exerpt from a recent article from that site:

........Trujillo has begun to examine the object's surface with one of the world's largest optical/infrared telescopes on Mauna Kea, Hawaii, but what the trio has been able to determine thus far is that Sedna is a planetoid a little smaller in size than Pluto with a highly elliptical orbit.

Sedna moves in a 10,500-year orbit around the Sun, approaching it only briefly.

The planetoid will become brighter over the next 72 years, then dim as it moves farther away on its 10,500-year trip to the farthest reaches of the solar system.

"The last time Sedna was this close to the Sun, Earth was just coming out of the last ice age," said Brown. "The next time it comes back, the world might again be a completely different place."

At its most distant, it is 130 billion kilometers (84 billion miles) from the Earth, or 900 times the distance between the Earth and the Sun.

Brown estimates Sedna's size at somewhere between Pluto and the planetoid Quaoar, measuring about 1,700 kilometers (1,000 miles) in diameter.

On that reckoning, it does not rise to the level of a planet. "It is not massive enough," he told reporters during a teleconference from NASA's Jet Propulsion Laboratory Monday.......

It's very interesting, though! No I don't know about that black hole.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

A dog, I have always said, is prose; a cat is a poem. ~Jean Burden
Jeanie is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Cat Forum : Cat Discussion Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome