Notable Stars
Photographs taken with the Hubble Space Telescope in 1995 have revealed white dwarf stars in M4 that are among the oldest known stars in the Milky Way Galaxy at an age of 13 billion years. One such white dwarf has been found to be a binary star with a pulsar companion, PSR B1620-26 and a planet orbiting it with a mass of 2.5 times that of Jupiter.
In 1987 a millisecond pulsar was discovered in M4 with a period of 3.0 milliseconds or about ten times faster than the Crab Pulsar.
Read more about this topic: Messier 4
Famous quotes containing the words notable and/or stars:
“a notable prince that was called King John;
And he ruled England with main and with might,
For he did great wrong, and maintained little right.”
—Unknown. King John and the Abbot of Canterbury (l. 2–4)
“The bay-trees in our country are all withered,
And meteors fright the fixèd stars of heaven.
The pale-faced moon looks bloody on the earth,
And lean-looked prophets whisper fearful change.
Rich men look sad, and ruffians dance and leap;
The one in fear to lose what they enjoy,
The other to enjoy by rage and war.
These signs forerun the death or fall of kings.”
—William Shakespeare (1564–1616)