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Twinkle twinkle little star

Why do stars twinkle and is it true that planets don't?

http://www.badastronomy.com/bitesize/twinkle.html

White Dwarf Star

Info on this type of star and links to related topics.

http://hyperphysics.phy-astr.gsu.edu/hbase/astro/whdwar.html#c1

Star Spectral Types

Table showing star temperature related to colour.

http://hyperphysics.phy-astr.gsu.edu/hbase/starlog/staspe.html#c1

Red Supergiant Star

A star of 15 solar masses exhausts its hydrogen in about one-thousandth the lifetime of our sun.

http://hyperphysics.phy-astr.gsu.edu/hbase/astro/redsup.html#c1

Henrietta Swan Leavitt: a Star of the Brightest Magnitude

A profile of Henrietta Swan Leavitt, a female computer, who did a lot of work categorising and measuring the brightness of stars.

http://chicagoacs.net/WCC/leavitt.html

Black Holes: What Happens to a Star When It Dies

A star exists in a delicate balance between the crushing force of gravity, on the one hand, and the push of incredibly hot gases on the other.

http://www.physicscentral.com/explore/action/blackholes-1.cfm

A biography of Danish astronomer Tycho Brahe (1546 - 1601), who made a remarkable star catalogue of over 1000 stars, far more than any astronomer before him. He proved that comets are not objects in ...

http://www.nada.kth.se/~fred/tycho/index.html

Neutron Stars - Introduction

Brief introduction from NASA on the nature of neutron stars, the most dense objects known, created in the cores of massive stars during supernova explosions. Includes links to related topics.