Download Answers for the HST Scavenger Hunt

Sheree’ Kearns
NASA Top Stars, 2009
Answers for the Student Worksheet for the
Hubble Space Telescope Scavenger Hunt
Instructions: Answers are typed in blue.
FIND IT!
NAME IT!
EXPLORE IT!
What is embedded in the center of the nebula?
Neutron star
Crab Nebula
Who first recorded this event?
Japanese and Chinese astronomers recorded this violent
event nearly 1,000 years ago in 1054, as did, almost
certainly, Native Americans.
Spiral Galaxy M100
What is the difference between a galaxy and a nebula?
A nebula is a cloud of gas and dust located between stars
and/or surrounding stars. A galaxy is a collection of stars,
gas, and dust bound together by gravity.
How are galaxies classified?
Galaxies are classified or grouped by their shape.
Sheree’ Kearns
FIND IT!
NASA Top Stars, 2009
NAME IT!
EXPLORE IT!
NGC 1300
Barred Spiral Galaxy
How is this type of galaxy different from a regular spiral
galaxy?
A barred spiral galaxy has a “bar” of stars and interstellar
matter, such as dust and gas, slicing across its center. A
typical spiral galaxy has a spherical central bulge of older
stars surrounded by a flattened galactic disk.
NGC 1132
Elliptical galaxy
Greek astronomers called a galaxy “galaxies kuklos”,
which is also thought to be the same kind of galaxy
pictured. What is the name of this galaxy?
The Milky Way.
What kind of galaxy is this?
Elliptical galaxy
Write a definition for this type of galaxy.
Elliptical galaxies are comprised mostly of old stars and
contain very little dust and “cool” gas that can form stars.
What kind of galaxy is this?
Irregular galaxy.
M82
Irregular galaxy.
Write a definition for this type of galaxy.
A galaxy that appears disorganized and disordered, without
a distinct spiral or elliptical shape. Irregular galaxies are
usually rich in interstellar matter, such as dust and gas.
Sheree’ Kearns
FIND IT!
NASA Top Stars, 2009
NAME IT!
EXPLORE IT!
Antennae Galaxies (NGC
4038/4039)
What is happening to these two galaxies?
Image shows the Antennae galaxies, which are
margining.
What are the two orange blobs in the picture?
The orange blobs to the left and right of image center
are the two cores of the original galaxies.
In what galaxy are these stars located?
The Milky Way
White dwarf stars
Approximately how old are these stars?
The ancient white dwarf stars are at least 12 to 13
billion years old.
Nebula M1-67 around Star
WR124
Give a definition of these kinds of stars.
Hot, dense remains of a low-mass star like our Sun that
has exhausted its sources of fuel for thermonuclear fusion.
What is a Wolf-Rayet Star?
Massive stars, which are usually are surrounded by outflowing gas clouds.
How is this star type different from white dwarf stars?
Wolf-Rayet stars are very young stars and represent
an early short-lived stage in stellar evolution. White
dwarf stars are very old and are in one of the final
stages of stellar evolution with thermonuclear energy
sources will become extinct.
Sheree’ Kearns
FIND IT!
NASA Top Stars, 2009
NAME IT!
EXPLORE IT!
Lord Rosse/ William Parsons
What did this scientist see in 1845?
A nebulaʼs spiral shape, M51.
This galaxy is now known by this name.
Whirlpool glaxay.
How far away is this galaxy from the Milky Way galaxy?
31 million light years
http://en.wikipedia.org/wiki/William_Parsons,
_3rd_Earl_of_Rosse
Edwin Hubble
In 1929 this scientist aimed the 100-inch telescope on
Mt. Wilson in California at Great Spiral in the
Andromeda Galaxy . What was this scientistʼs name?
Edwin Hubble
This scientist actually found the existence of one of
these.
Another galaxy.
Black hole
Take a journey
to this
http://hubblesite.or
g/explore_astrono
my/
Take a journey to a black hole. When visiting a black
hole, what force distorts the view seen by bending the
light coming from distant stars?
Gravity
Name the location of the two black holes featured in this
interactive video.
Cygnus X-1 binary star system and Andromeda galaxy
Sheree’ Kearns
FIND IT!
This number expresses the
rate at which the universe
expands with time.
NASA Top Stars, 2009
NAME IT!
Hubbleʼs constant
The Big Bang
Term commonly used to
describe how the universe
began. Check this web
page:
http://hubblesite.org/newsc
enter/archive/releases/2004
/28/
Event horizon
EXPLORE IT!
In this news release, Riess used Hubble Space
Telescope's crisp view along with 2003 data from
NASA's Wilkinson Microwave Anisotropy Probe to refine
the value of the universe's expansion rate to three
percent. What does this new value imply about dark
energy? This new value implies that dark energy really is
a steady push on the universe as Einstein imagined, rather
than something more effervescent that changes markedly
over time.
What percent of the way back in time has the Hubble
looked to see glimpses of the beginning of the universe?
95 percent
Define this term.
The spherical outer boundary of a black hole. Once matter
crosses this threshold, the speed required for it to escape
the black hole’s gravitational grip is greater than the speed
of light.
When scientists used the HST to study Cygnus X-1, they
were able to observe two of these events, which defines
the tern defined above.
Infall events or dying pulse train," the rapidly decaying,
precisely sequential flashes of light from a hot blob of gas
spiraling into the black hole.
Credit: Answers and photos taken from http://hubblesite.org/
http://en.wikipedia.org/
http://www.answers.com/ http://www.nasa.gov