Carrie Spratford

1

Adopt A Constellation Final Project
Carrie Spratford Period 1 June 2, 2003
2
PEGASUS
The Winged Horse
3
HISTORY
4
(No Transcript)
5
Pegasus was eventually tamed by Bellerophone. The
constellation appears to be inverted in relation
to the constellations around it. One explanation
for the inverted position is that while
Bellerophone was attempting to reach Mount
Olympus, Zeus tried to stop him by sending a
horsefly to sting Pegasus. The constellation
depicts the winged horse bucking Bellerophone off
his back.
6
(No Transcript)
7

PEGASUS THE CONSTELLATION
8
The Pegasus Boundary
9
Pegasus is most easily observed in the month of
October when it reaches its highest point in the
evening sky.
Pegasus can be easily spotted by the Great Square.
10
The Main Stars of Pegasus are
11
Markab
12
Star Information
Alpheratz, originally alpha Peg is now assigned
to the constellation Andromeda under
the name alpha And.
13
Star Information
14
Star Information
The brightness of this star varies irregularly
between 4.612 and 2.659.
Scheat is also the oldest and coolest of the
stars in Pegasus.
15
Star Information
16
Star Information
Algenib is the youngest, and hottest of the
stars in Pegasus.
17
Pegasus Deep Sky Objects
18
(No Transcript)
19
(No Transcript)
20
The Deerlick Group
?The Deerlick Group is a elongated spiral galaxy
(Sa) with a bright core.
? The Deerlick Group was among the earliest
recognized spiral galaxies, and listed by Lord
Rosse in his list of 14 "spiral or curvilinear
nebulae" discovered before 1850.
? One supernova has been discovered in NGC 7331
so far SN 1959D. SN 1959D reached a top
magnitude of 13.4
? Magnitude 9.5
? R.S. 22h 37m 16.5s
? Dec 3426'17"
? Also known as NGC 7331
21
(No Transcript)
22
NGC 7094
?Planetary nebula disc with a center star.
? RA 21h 37m 04.7s
? Dec 1248'04"
? NGC 7094 is made up of mostly
23
(No Transcript)
24
NGC 7479
?NGC 7479 is a barred galaxy (SBc)
? Magnitude 11.0
? RA 23h 05m 05.4s
? Dec 1220'17"
? NGC 7479 is about 105 million light years away.
25
(No Transcript)
26
M15
? M15 is one of the most dense globular clusters
known and contains an irregularly round and
bright middle.
? The stars in M15 are estimated to be 12 billion
years old, and among the first generation of
stars to form the Milky Way.
?Kuestner 648 was the first planetary nebula to
be found in a globular cluster. Only three more
planetary nebulae in globular clusters have been
discovered since.
? M15 is about 40,000 light-years away.
? RA 21h 30m 08.9s
? Dec 1210'37"
? Magnitude 6.4
27
(No Transcript)
28
Stephans Quintet
? Stephans Quintet is a group of five galaxies
positioned quite closely together.
? Stephans Quintet is an excellent example of a
compact group of galaxies.
? RA 22h 36m 04.4s
? Dec 3358'17"
?Magnitude 13.6
29
Other Pegasus Information
30
Pegasus has two meteor showers
The Alpha Pegasids
31
Pegasus has two meteor showers
The Upsilon Pegasids
32
Pegasus is also the location of
33
51 Pegasi
?51 Pegasi is a sun-like class G star but is 1.3
times more luminous.
? There is a planet larger than Jupiter orbiting
close to this star. This planet is the first one
found by the Doppler technique.
? 51 Pegasi and its planet are important for
discovering alternative solar system structure
and understanding our own.
? RA 22h 57m 39.152s
? Dec 2047'25.178"
? It is 50.10 light-years away.
? Magnitude 5.45
34
Stephans Quintet A Closer Look
35
What is it?
?Stephans Quintet is the first compact group of
galaxies to be discovered and has been studied
intensively for decades.
?It lies about 270 million light-years away
North-West of the Great Square in Pegasus.
? This group of galaxies is so close together
that each of their gravity pulls the others in
and they are in constant contact with each other.
? Magnitude 13.6
? RA 22h 36m 04.4s
? Dec 3358'17"
36
Stephans Quintet consists of
37
Galactic Collisions
In the Cartwheel Galaxy, a smaller intruder
galaxy careened through the galaxy's core. Like a
rock tossed into a lake, the collision sent a
ripple of energy into space, plowing gas and dust
in front of it at 200,000 miles per hour. The
great energy wave heated and compressed the
galaxy's dust and gas, producing an expanding
ring of several billion new stars. This is an
unusual opportunity to study new stars, because
that many stars would ordinarily take much longer
to form.
Galaxies travel through space at speeds
approaching two million miles per hour. In
clusters, the member galaxies are relatively
close together so their gravity pulls each other
in. Inevitably, collisions occur.
The Tadpole Galaxys tail is about 280 thousand
light-years long and is made up of massive,
bright blue star clusters, dust, and gas.
The space between stars is so vast that when
galaxies collide, the stars in the galaxies
usually do not collide.
38
Star Birth in Galactic Collisions
? In Stephans Quintet, NGC 7318B at the moment
is colliding with NGC 7318A. This triggers giant
bursts of star formation as it plows through the
gas dispersed between the galaxies.
? Literally hundreds of star clusters and
clusters of star clusters can be seen in these
three images.
Stephans Quintet
Antennae Galaxies
Tadpole Galaxies
39
How Does This Affect Astronomy?
?The study of galactic collisions is beneficial
to astronomy because it helps us understand how
our galaxy came to be, and what will happen to it
in the future.
? Astronomers also believe that one day our Milky
Way galaxy will collide with the Andromeda
galaxy. Using information we have gathered from
such groups as Stephans Quintet, we can predict
what will occur.
40
Hubble Explanation