SCP-1548-EX

	"EXPLAINED ANOMALY"
	THE FOLLOWING PAGE HAS BEEN RECLASSIFIED AS EXPLAINED. NATURAL PHENOMENON IS PSR B0531+21 (CRAB PULSAR).

“	I don't want to go.	„
	~ SCP-1548-EX's final transmission

Background

SCP-1548-EX, formerly classified as an anomalous entity known as "The Hateful Star," was initially discovered in 1949 at the Yerkes' Observatory in Chicago, Illinois. Originally believed to be a sentient, malevolent star approximately 24 light years away from Earth, the object was observed sending morse code messages through pulses of ionizing radiation. These messages were aggressive, involving the death, destruction, and humiliation of the human race.

The object was later identified as a non-anomalous pulsar - specifically PSR B0531+21 in the Crab Nebula - and reclassified as -EX. The perceived messages were determined to be a fluke of cosmic proportions, with random pulses coincidentally forming morse code patterns. The pulsar was 2.41 solar masses, exceeding the theoretical limit of 2.3 solar masses for neutron star stability, and was surviving by being in motion at approximately 85% of the speed of light. It eventually collapsed in a planck second when it shifted opposite its direction of motion.

Appearance

• General Description: A significantly bright stellar object, appearing as an elongated streak due to its rapid motion and rotation.

• Physical Properties: Incredibly unstable with a highly erratic axis, changing orientation randomly.

• Radiation Jets: Two twin jets of ionized radiation emitted from its axis in seemingly random pulses.

• Final Form: Collapsed into a black hole after directional shift, releasing a massive radio burst.

Personality

• Perceived Malevolence: Initially believed to be sending hateful messages until the end, though this was later proven to be coincidental pattern formation.

• Non-Sentient: Confirmed to be not malicious, nor even sentient, simply a natural astronomical phenomenon.

• Final "Message": The last comprehensible pattern formed "I don't want to go", though this was also coincidental.

Relationships

Foundation Personnel

• Head Researcher Natalie - Proposed reclassification to -EX status

• Dr. Thompson - Lead physicist studying the object's properties and eventual collapse

• Dr. Yan - Project overseer who managed the transition after reclassification

• O5-3 - Approved the reclassification to -EX

General Information

Name: SCP-1548-EX, PSR B0531+21

Other Names: The Hateful Star (former designation), Crab Pulsar, SCP-1548-ARC, The Radio Star

Origin: SCP Foundation

Greater Franchise: SCP Foundation

First Appearance: SCP-1548 File Log

Latest Appearance: Now I Understand the Problems You Can See

Company: SCP Foundation

Creator: Varaxous

Gender: N/A (Astronomical object)

Sexuality: N/A

Pronouns: It/Its

Handedness: N/A

Age: Unknown

Birthday: N/A

Time Period: 1949-Present

Timeline: Main Timeline

Homeworld: Space (Crab Nebula)

Residence: Approximately 24 light years from Earth

Discovered At: Yerkes' Observatory in Chicago, Illinois

Story Role: Explained Anomaly, Former Keter SCP

Legacy: Worldwide Legacy (Led to greater understanding of pulsars and blitzars)

Influence: Unknown Influence**

Language: N/A (Communicated via morse code - later proven coincidental)

Ethnicity: N/A

Religion: N/A

Classification: Formerly Keter, now Explained (-EX)

Species: Pulsar (Neutron Star)

State of Being: Regular (Collapsed into black hole)

Physiology: Stellar Physiology

In-Universe Creator: Natural stellar evolution

Occupation: N/A

Containment Status: No Longer Applicable (Destroyed after collapsing into black hole)

Combat Style: N/A

Affiliations: None

Discovery Date: 1949

Distance from Earth: Approximately 24 light years

Mass: 2.41 solar masses

Height: N/A

Weight: 2.41 solar masses

Status: Destroyed (Collapsed into black hole)

Alignment: Unaligned (Non-sentient astronomical object)

Threat Level: Stellar Threat (Could have devastated Earth's atmosphere, Would have reached Earth in 5400 years)

Potential:

• Type(s) of Potential: Fixed Potential
• Level of Potential: Fixed Potential
• Description: Radiation bursts capable of devastating Earth's atmosphere from 24 light-years away
• Limitations: Non-sentient, collapsed before reaching Earth

Codex Statistics

Grade: A

Tier: Low 5-B energy production, Lower when collapsing into a black hole. 4-C through ramming

Cardinality: Finite

Dimensionality: 3-D

Power Source: Nuclear Fusion (Nuclear fusion and gravitational collapse)

Attack Potency: Small Planet level energy production (The Crab Pulsar has an spin down luminosity of 4.6 × 10^38 erg/s, or 4.6 × 10^31 Watts a second), Lower when collapsing into a black hole (While the total mass-energy remains the same, the destructive output becomes limited to gravitational effects and Hawking radiation, which is significantly weaker than active stellar radiation output). Star level through ramming (2.41 solar masses, capable of producing radiation bursts that could devastate planetary atmospheres from 24 light-years away)

Durability: Star level (Maintained structural integrity despite exceeding Chandrasekhar limit through rapid rotation)

Striking Strength: N/A

Lifting Strength: Stellar Class (Gravitational pull of 2.41 solar masses)

Travel Speed: Relativistic+ (Traveling at 85% the speed of light)

Attack Speed: Speed of Light (Radiation bursts travel at light speed)

Reaction Speed: Inapplicable (Non-sentient)

Stamina: At least Superhuman+ (Would have continued for millions of years if not for directional shift)

Range: Interstellar (Radiation retained enough energy to affect Earth from 24 light-years away

Intelligence: Mindless Intelligence

Knowledge: Knowledgeless level

Powers and Techniques

• Radiation Manipulation (Periodically emits bursts of ionizing radiation)
• Energy Projection (Twin jets of concentrated ionized radiation)
• Gravity Manipulation (2.41 solar masses of gravitational pull)
• Light Manipulation (Significantly brighter than any recorded star)
• Vibration Manipulation via rotation (Rotating very quickly and randomly)
• Black Hole Manipulation (Collapsed into a black hole in a planck second)

Equipment

None

Notable Techniques

• Ionizing Radiation Bursts: Periodic emission of powerful radiation pulses
• Twin Jets: Concentrated beams of radiation from poles
• Relativistic Motion: Maintained stability through high-speed motion
• Gravitational Collapse: Instant collapse into black hole when conditions changed

Other

Standard Tactics: Non-sentient object that emitted random radiation pulses and maintained stability through rapid rotation and motion.

Weaknesses:

• Unsustainable behavior due to mass exceeding neutron star limit.
• Collapsed instantly when shifting opposite to direction of motion.
• Required constant motion and rotation to prevent gravitational collapse.

Explanations

SCP-1548-EX represents a unique case in Foundation history where an apparently anomalous, malevolent entity was revealed to be a natural astronomical phenomenon - specifically a pulsar that happened to create morse code patterns through pure coincidence. As a neutron star exceeding the Chandrasekhar limit of 2.3 solar masses, it maintained stability only through extreme rotation and relativistic motion.

When neutron stars exceed this mass limit, they lack sufficient neutron degeneracy pressure to counteract their own gravity. SCP-1548-EX compensated through centrifugal force from rapid rotation and relativistic effects from traveling at 85% light speed. However, this created an inherently unstable system - any change in angular momentum or direction would eliminate these compensating forces, resulting in immediate gravitational collapse. When the pulsar shifted direction opposite to its motion vector, it lost the relativistic mass reduction effect and collapsed into a black hole within a Planck time (10^-43 seconds), forming what astronomers call a "blitzar" event.

The tier reduction when collapsing into a black hole reflects the fundamental change in energy output: while a pulsar actively converts rotational and magnetic energy into powerful radiation that can affect planetary systems from dozens of light-years away, a black hole of the same mass only affects its immediate gravitational vicinity and emits negligible Hawking radiation.

Miscellaneous Feats

Radiation OutputPhysical PropertiesCollapse Event

• Brightest recorded stellar object at time of discovery.
• Radiation capable of devastating Earth's atmosphere from 24 light-years.
• Powerful enough to be classified as potential fast radio burst source.

• Maintained stability at 2.41 solar masses (exceeding theoretical limit).
• Traveled at 85% the speed of light.
• Rotation fast enough to prevent gravitational collapse.

• Collapsed in one Planck time unit (fastest possible timeframe).
• Released final radio burst during collapse.
• Formed a black hole from blitzar event.

Trivia

• The first "message" contained a typo: "Death for the undsrving".
• Less than 1% of pulses formed coherent morse code.
• Stopped producing coherent patterns 20 years before reclassification.
• The real PSR B0531+21 (Crab Pulsar) is actually about 6,500 light-years from Earth, not 24.

Battle Records

0-0-0

VictoriesLossesInconclusive

None

None

None

References

• SCP-1548 Original Article.
• Video Killed The Radio Star.