All
Search
Images
Videos
Shorts
Maps
News
More
Shopping
Flights
Notebook
Report an inappropriate content
Please select one of the options below.
Not Relevant
Offensive
Adult
Child Sexual Abuse
Antennaweb.org
Zip Code
TV Signals by
Zip Code
Antenna Point.com
Antenna Pointing by
Zip Code
Zip Code
Finder in Excel
TV Reception Map
Zip Code
Antenna Web.com
Antenna TV Guide by
Zip Code
DTV Channels by
Zip Code
Where to Point My Antenna
Zip Code
Antenna Channels by
Zip Code
TV Listings by
Zip Code
TV Signal Strength by
Zip Code
Direct TV Guide by
Zip Code
Length
All
Short (less than 5 minutes)
Medium (5-20 minutes)
Long (more than 20 minutes)
Date
All
Past 24 hours
Past week
Past month
Past year
Resolution
All
Lower than 360p
360p or higher
480p or higher
720p or higher
1080p or higher
Source
All
Dailymotion
Vimeo
Metacafe
Hulu
VEVO
Myspace
MTV
CBS
Fox
CNN
MSN
Price
All
Free
Paid
Clear filters
SafeSearch:
Moderate
Strict
Moderate (default)
Off
Filter
Antennaweb.org
Zip Code
TV Signals by
Zip Code
Antenna Point.com
Antenna Pointing by
Zip Code
Zip Code
Finder in Excel
TV Reception Map
Zip Code
Antenna Web.com
Antenna TV Guide by
Zip Code
DTV Channels by
Zip Code
Where to Point My Antenna
Zip Code
Antenna Channels by
Zip Code
TV Listings by
Zip Code
TV Signal Strength by
Zip Code
Direct TV Guide by
Zip Code
0:21
A type II supernova is a very massive star because during its life it maintains a balance of forces between the energy it produces, which is centrifugal, towards the outside, and gravity, which is a force towards the interior of the star. When the fuel in its core runs out, the star begins to collapse at its core, producing a shock wave that causes the star to explode and the rest of the outer layers to be thrown into space. Supernovae are relatively rare events and difficult to detect, in the c
21.1K views
Nov 21, 2022
Facebook
Free AstroScience
See more
More like this
Feedback