Monday, September 11, 2006

Science Questions for Dr. Perry

Class, here is where you can ask Dr. Perry astronomy questions you'd like answered! It's your very own spot to ask an expert! Proofread your questions carefully before you post!

Dr. Perry was one of the managing astrophysicists who worked on Hubble Space telescope. Retired, he is currently producing a local access cable TV show, "Know Your Sky," for Anne Arundel County. His show's purpose is to provide the amateur star gazer with information about celestial objects visible during each month of the year and how to find them in the night sky. His other expertises include forest and agricultural preservation.

10 Comments:

At Monday, September 18, 2006 11:40:00 AM, Blogger Madison said...

dear dr.perry,
if scientists said, that pluto was a planet, would everything behind pluto be a planet? have scientists ever been to those planets/whatever the things behind pluto are? what are those things behind pluto? did scientists ever think of pluto as a planet before? i really like science and space. i always want to know more about space.

 
At Wednesday, October 04, 2006 12:00:00 PM, Blogger Riley said...

Dear Dr. Perry,
I'm doing a project on Uranus and I learned that somthing hit Uranus so hard that it knocked it on its side. I think it was a comet, but I'm not sure. Could you correct me possibly?

Thanks,
Riley
Cassidy

 
At Wednesday, October 04, 2006 12:09:00 PM, Blogger Katie H. said...

Dear Dr.Perry
we are doing a project on Jupiter we have alot of info but we dont have enough.There so much still for us to learn can you help us? We know alot but we are cunfusted about the moons! Are there 16 or 64 they both keep poping up everywhere! what should we do?

thanks the jupiter group

 
At Thursday, October 05, 2006 3:30:00 PM, Blogger Kayla said...

Dear Dr.Perry
Now that Pluto is a dwarf planet is it's moon Charon a dwarf planet, too?

 
At Friday, October 27, 2006 1:35:00 PM, Blogger Hana said...

Dear Dr.Perry,


We know that the sun is a medium sized star well what is the biggest star so far?

 
At Friday, October 27, 2006 1:48:00 PM, Blogger Rachel said...

dear docter perry what is the biggest dwarf plant? and...when is a spase craft going pluto/





rachel Genevieve

 
At Monday, November 06, 2006 7:50:00 PM, Blogger Hana said...

Did the first dog in space, die in space?

 
At Thursday, November 09, 2006 7:27:00 PM, Blogger Dr. Perry said...

1) If scientists said, that Pluto was a planet; would everything behind Pluto be a planet?

Have scientists ever been to those planets/whatever the things behind Pluto are?

What are those things behind Pluto? Did scientists ever think of Pluto as a planet before?


On August 24, 2006, the International Astronomical Union voted at the end of its 26th General Assembly to establish a new class of substellar objects in the Solar System called "dwarf planets", which may eventually encompass many large and relatively round Edgeworth-Kuiper ice bodies such as Eris (formerly 2003 UB313) and Pluto.

The Kuiper belt is an area of the solar system extending from the orbit of Neptune at 30 Astronomical Units to 50 Astronomical Units from the Sun.

An Astronomical Unit is approximately equal to the mean distance between the Earth and Sun or 93 million miles.

The objects within the Kuiper Belt together with the members of the scattered disk extending beyond, are collectively referred to as trans-Neptunian.

With the help of NASA's Hubble Space Telescope, astronomers have determined that 2002 LM60, an icy Kuiper belt object dubbed "Quaoar," by its discoverers, is the largest body found in the solar system since the discovery of Pluto 72 years ago.

Quaoar (pronounced kwa-whar) is about half the size of Pluto. Like Pluto, Quaoar dwells in the Kuiper belt.



2) I'm doing a project on Uranus and I learned that something hit Uranus so hard that it knocked it on its side. I think it was a comet, but I'm not sure. Could you correct me possibly?

Uranus’ rotation axis is nearly horizontal with respect to the ecliptic plane — the imaginary plane containing Earth’s orbit, as well as the orbits of most of the planets — as though Uranus had been knocked on its side. This unusual orientation may be the result of a collision with a planet-sized body early in the planet’s history, which apparently radically changed Uranus’ rotation. A comet would have been too small, not massive enough, to cause this change.


3) We are doing a project on Jupiter we have a lot of info but we don't have enough. There so much still for us to learn can you help us? We know a lot but we are confused about the moons! Are there 16 or 64 they both keep popping up everywhere! What should we do?

The official NASA website lists 63 moons.

To get the latest scoop on Jupiter's moons

Go to http://solarsystem.nasa.gov/planets/

Then click on Jupiter on you left

Next click on the word "Moons" on the upper panel

Just pick the moon you're interested in, click on it and get the latest data.



4) Now that Pluto is a dwarf planet is its moon Charon a dwarf planet, too?

Scientists sometimes called Pluto and Charon a double planet, since Charon is nearly half the size of Pluto.

And Pluto and Charon, together, orbit each other around a shared central point which is external to both bodies.

So, since Pluto is now classified as a dwarf planet, it's safe to assume that Charon is a dwarf planet also.



5) We know that the sun is a medium sized star well what is the biggest star so far?

Mu Cephi in the constellation Cepheus is about 1500 times the size of our sun.

Betelgeuse in Orion is about 900 times the size of our sun.

Antares - about 530 times the size of our sun.

Deneb in Cygnus is about 145 times the size of our sun.


6) What is the biggest dwarf planet? And...When is a spacecraft going Pluto?

The largest dwarf planet is Eris.

Eris was discovered by the US astronomers Mike Brown, Chad Trujillo and David Rabinowitz in July 2005.

Eris is larger than Pluto.

This object forced astronomers to rethink the definition of a planet.

Pluto and Eris are now both ‘dwarf planets’ along with Ceres, the largest object in the asteroid belt between Mars and Jupiter.

When is a spacecraft going to Pluto?

A spacecraft called New Horizons was launched in January 2006. If all goes well it should reach Pluto in 2015.

7) Did the first dog in space, die in space?

On November 3, 1957, the U.S.S.R. stunned the world with a space sensation -- the launch of Sputnik 2 with a live dog on-board. The Soviet press boasted about the 250-pound object equipped with a cabin, providing all the necessary life support for a dog named Laika. The Soviets admitted soon after the launch that the spacecraft would not return, meaning that the animal was doomed from the start. Laika survived in orbit for four days and then died when the cabin overheated.

 
At Sunday, November 12, 2006 1:51:00 PM, Blogger Isaiah said...

Dear Dr.Perry

How was the solar system made?

 
At Friday, December 15, 2006 6:34:00 PM, Blogger Rebecca said...

When is haleys comet coming agian?
From,
Rebecca

 

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